20+3/4(12-y)=3/2y-10
a)156/7
b)26
c)52/3



algebra 2

Answers

Answer 1
Your answer is 52/3

.......

Related Questions

which pair of triangles is congruent by AAS?

Answers

pqt rqt are congruent by aas i think 

Answer:

Triangles PQT and RQT are congruent (option D)

Step-by-step explanation:

The AAS or Angle- Angle- Side Theorem says that if two angles and any side of one triangle are congruent to two angles and any side of another triangle, then the triangles are congruent.

So, triangles PQT and RQT are congruent.

Both triangles have angle Q as right angle and angle P and R are also equal. And both have side QT common.

So, these are congruent via AAS.

y+15 <3 for inequality

Answers

Hello there!

y + 15 < 3

Start by subtracting 15 on both sides

y + 15 - 15 < 3 - 15

y < -12

As always, it is my pleasure to help you guys on here. Let me know if you have any questions.

What are MODE,MEDIAN
EXPLAIN pls.

Answers

To find the mean, add up the values in the data set and then divide by the number of values that you added.
To find the median, list the values of the data set in numerical order and identify which value appears in the middle of the list.
To find the mode, identify which value in the data set occurs most often.
mode- is the number that is repeated the most, and median is the middle number when u list the numbers from least to greatest. hope this helps....


will give medal to best answer!
The given measurements may or may not determine a triangle. If not, then state that no triangle is formed. If a triangle is formed, then use the Law of Sines to solve the triangle, if it is possible, or state that the Law of Sines cannot be used.

C = 38°, a = 19, c = 10,

Answers

We have two sides and one angle opposite to one of the known sides.

Begin with applying the Law of Sines to find angle A:
[tex] \frac{sin A }{a} [/tex] = [tex] \frac{sin C }{c} [/tex]

Then, solve for sin A:
sin A = [tex] \frac{a sinC}{c} [/tex]

Now, plug in numbers:
sin A = 19 × sin(38) / 10 = 1.17

We know that it does not exist an angle whose sin is bigger than 1, therefore
no triangle is formed.

Answer:

No triangle is formed

Step-by-step explanation:

took test

Write three to five sentences explaining which levels of production provide Alonzo’s Cycling with the maximum profit.

Answers

The optimal level of production for Alonzo's Cycling is at the point where the profit reaches its peak before starting to decline with further increases in production. This is the level of production that Alonzo's Cycling should aim for to achieve the marginal profit.

To determine which levels of production provide Alonzo's Cycling with the maximum profit, one must consider both the fixed costs and the variable costs associated with production.

The profit for each level of production is calculated by subtracting the total costs (fixed costs plus variable costs) from the total revenue generated by sales. The level of production at which profit is maximized is where the difference between total revenue and total costs is the greatest.

This can be found by analyzing the marginal cost and marginal revenue of production. When marginal revenue equals marginal cost, and if the additional production leads to a decrease in profit, that is the point of maximum profit.

Beyond this point, producing more units would decrease the total profit due to the law of diminishing returns, where the cost of producing additional units exceeds the revenue they generate.

Therefore, the optimal level of production for Alonzo's Cycling is at the point where the profit reaches its peak before starting to decline with further increases in production. This is the level of production that Alonzo's Cycling should aim for to achieve the maximum profit.

Which statement is true about the product of a non-zero rational number and an irrational number?
A) The product of a non-zero rational number and an irrational number is always a rational number.
B) The product of a non-zero rational number and an irrational number is never an irrational number.
C) The product of a non-zero rational number and an irrational number is sometimes a rational number.
D) The product of a non-zero rational number and an irrational number is always an irrational number.

Answers

The answer is defiantly D

The width of Zorn's patio is labeled in the diagram below. If the perimeter of the patio is (30x + 26) feet, what is the length of the patio?

2x^2=450

Determine which statement is true about the solutions to the equation.

The solutions are -15 and 15 and both are reasonable side lengths.

The solutions are -30 and 30 and both are reasonable side lengths.

The solutions are -30 and 30 but only 30 is a reasonable side length.

The solutions are -15 and 15, but only 15 is a reasonable side length.

Answers

we have that
2x²=450 ----------> x²=450/2----------> x=√225
x1=+15
x2=-15

a reasonable length measurement should be positive
therefore

the answer is 
The solutions are -15 and 15, but only 15 is a reasonable side length.

Answer:

the answer is  (8x+9)

Step-by-step explanation:

Type 3xxyyy using exponents.

Answers

Nsnnsnsnsbsbbsbsbsbbs s s. Ssbsb
Hello there!

The answer to your question is simple.

3xxyyy

Count how many xs there are. This is the exponent on the x.

3x²yyy

Count how many ys there are. This is the exponent on the y.

3x²y³

I really hope this helps!
Best wishes :)

HELP FAST - given that ig= x-4 , ik = 9x-19 and jk = 5x+12 find ij, jk and ik

Answers

Answer:

THIS IS WRONG I TOOK THE TEST... DONT KNOW THE ANSWER STILL.

Step-by-step explanation:

Sketch the following to help answer the question. Kite QRST has a short diagonal of QS and a long diagonal of RT. The diagonals intersect at point P. Side QR = 5 m and diagonal QS = 6 m. Find the length of segment RP.
3 m
4 m
5 m
6 m

Answers

The length of RP is 4 m.

Since a kite is symmetric about one of its diagonals, then the other diagonal bisects that one.  Additionally, the diagonals are perpendicular to each other.  This forms two right triangles inside of the kite.

The bottom leg of the right triangle will be 3 (half of the diagonal) and the hypotenuse will be 5.  We will use the Pythagorean theorem to answer this:

3²+b²=5²
9+b²=25

Subtract 9 from both sides:
9+b²-9=25-9
b²=16

Take the square root of both sides:
√(b²) = √16
b=4

Answer:

Given: Kite QRST has a short diagonal of QS and a long diagonal of RT. The diagonals intersect at point P. Side QR = 5m and diagonal QS = 6m.

Since, diagonals of kite bisect each other, thus QP=6m

Now, in ΔPQR, we have

(QR)²= (RP)²+(QP)²

(5)²= (3)²+(RP) ²

25=9+(RP)²

25-9= (RP)²16= (RP)²

RP= 4m

Therefore,  the length of segment RP is 4m.

Step-by-step explanation:

Then, the dot ran from −34 to −66. What distance did it cover? If this run took the dot 5 minutes, what was its average speed?

Answers

The distance between -66 and -34 is 32 units.  To find the speed in 5 minutes, you will divide the distance of 32 units by the time it took to travel that distance (5 minutes).  You can write it as a rate 32 units/5 mins.  The speed is 6.4 units per minutes when you divide it out.  

Final answer:

The dot covered a distance of 32 units when it ran from -34 to -66. Assuming the distance is measured in meters, and the dot took 5 minutes (300 seconds) to cover this distance, the average speed would be 0.1067 m/s.

Explanation:

To determine the distance the dot covered when it ran from -34 to -66, we need to calculate the absolute value of the difference between the two points. The formula for distance in this case is |final position - initial position|, so the distance covered = |-66 - (-34)| = |-66 + 34| = | -32 | = 32 units.

Now, to determine the average speed of the dot, we divide the total distance traveled by the time it took to cover that distance. Given that it took the dot 5 minutes to cover the distance, we convert minutes to seconds because speed is typically measured in meters per second (m/s) in physics. There are 60 seconds in a minute, so 5 minutes is 300 seconds. Therefore, the average speed is distance/time = 32 units / 300 seconds.

The exact units of measurement for distance have not been specified in the question, but assuming the distance is in meters (m), the average speed would be calculated as 32 m / 300 s = 0.1067 m/s.

Katie decides to sell lemonade to make some money. Katie’s mom said she will double the amount of money she makes. If Katie sells 66 cups of lemonade at $0.75 each, how much money does she make?

Answers

First take 66(.75) to get the number she makes. then tripple that answer to get the number she makes total, as her mom is doubling it. think that if she makes $10, her mom would pay her $20, so she would have $30. just apply it to this problem set.

The answer is $99! :)

Haruka hiked several kilometers in the morning. She only hiked 666 kilometers in the afternoon, which was 25\%25%25, percent less she had hiked in the morning.How many kilometers did Haruka hike in all?

Answers

Given that Harula hiked 6 km which is only 25 % of the distance she hiked in the morning, the distance she hiked in the morning will be:
100/25*6
=24 km
thus the total distance she hiked will be:
24+6
=30 km

Answer:

its 14 in all actually

Step-by-step explanation:

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Parallelogram DEFG has been rotated. Which statements are correct? Check all that apply.

Answers

The statements that are correct are:

point F ⇒ point F'
Point D of the pre-image corresponds to pint D' of the image
Parallelogram DEFG maps to parallelogram D'E'F'G'

In geometry, rotation involves turning of an object about a center. The statements that are correct are:

point F [tex]\to[/tex] point F'point D of the preimage corresponds to point D' of the imageparallelogram DEFG maps to parallelogram D'E'F'G

When rotation is applied to a shape, the orientation of the shape will change; however the corresponding points will be unchanged.

This means that:

DEFG will be mapped to D'E'F'GPoints D, E, F and G will correspond to points D', E', F' and G'.

Hence, the true statements are: (a), (c) and (e)

Read more about rotation at:

https://brainly.com/question/1571997

Part A: Explain why we do not measure the rate at which water flows out through a shower head in cubic meters per second? In your explanation, use reasoning based on appropriate units to model this situation. (5 points) Part B: What are the two quantities that should be measured to find the rate at which water flows out of a shower head? Explain how the rate can be determined. (5 points)

Answers

We have that the stream of water is coming out in small quantities; at most liters at a time since the stream has a width of around 10cm at most times. Hence, cubic meters per second is too large a unit to measure the small quantity of water going through the shower.
We have that we can calculate the rate if we know the surface area of the flow and the speed of the water. If one multiplies those 2 together, one gets the rate because the speed of water is pretty much how much a front of water is moving per second; if you multiply it by its surface area, you get how much a volume of water is moving.
Final answer:

The units to measure the rate of water flow from a shower are smaller than cubic meters per second due to the typical small value of this rate. To determine the rate, you need to know the cross-sectional area of the outlet and the water speed, multiplying the area by the speed.

Explanation:

Part A: We do not measure the rate at which water flows out through a shower head in cubic meters per second because the typical rate of water flow from a shower is much smaller compared to one cubic meter per second. Using such a large unit for a typically small value would result in decimal figures that are often difficult to comprehend. For instance, a regular shower might output 0.01 cubic meters per minute, which convert to a very small number in cubic meters per second; hence cubic centimeters per second or liters per minute are more practical units.

Part B: To calculate the rate of flow from a showerhead, you need to know two quantities: the cross-sectional area of the outlet (which can be calculated if you know the diameter), and the speed at which the water is moving. The rate of flow (volume per unit time) can then be determined by multiplying the area by the speed of the water. Based on the given data from your textbook - a faucet with a 1.80-cm diameter and a speed of 0.500 m/s - the flow rate can be determined using the formula for the volume of a cylinder (Area of the base x Height), where in this case the 'height' would be the speed.

Learn more about Water Flow Rate Calculation here:

https://brainly.com/question/35312130

#SPJ12

What are the zeros of the quadratic function f(x) = 2x2 + 8x – 3? x = –2 – and x = –2 + x = –2 – and x = –2 + x = 2 – and x = 2 + x = 2 – and x = 2 +

Answers

The given quadratic function is:

[tex]f(x)=2 x^{2} +8x-3[/tex]

The zeros of the quadratic functions also known as its roots can be found using the quadratic formula.

According to the quadratic formula:

[tex]x= \frac{-b+- \sqrt{ b^{2}-4ac } }{2a} [/tex]
here,
b = coefficient of x-term
a = coefficient of x²-term
c = costant term

For given function:
a = 2
b = 8
c = - 3

Using these values in the formula, we get:

[tex]x= \frac{-8+- \sqrt{64-4(2)(-3)} }{2(2)} \\ \\ x= \frac{-8+- \sqrt{88} }{4} \\ \\ x= \frac{-8+-2 \sqrt{22}}{4} \\ \\ x= \frac{-4+- \sqrt{22} }{2} \\ \\ x= \frac{-4+ \sqrt{22} }{2}, x= \frac{-4- \sqrt{22} }{2} [/tex]

Thus, these values of x are the zeros of the given quadratic function f(x)=2x²+8x-3
The answer is A for anyone that doesn't understand the other answer.

In triangle QRS, QR is congruent to SR and RT bisects QS. What justification can you give for QRT congruent to SRT and give the Triangle Congruence Postulate that supports your reason.
Answers:

Midpoint Theorem, SSS

Given, SSS

Definition of a segment bisector; SSS

Definition of an isosceles triangle, SAS,

Answers

Since RT bisects QS, we have QT congruent to ST. Bisect means it cuts QS in half. The we have RT congruent to RT since it is the same. By SSS, we have triangle QRT congruent to triangle SRT since QT is congruent to ST, RT is congruent to RT, and QR is congruent to SR. Each side is congruent to its respective side in the other triangle and that is SSS (side, side, side).
The answer is Definition of a segment bisector; SSS.
Explanation:

Since RT bisects QS, we have QT congruent to ST. 
 By SSS, we have triangle QRT congruent to triangle SRT
so, since QT is congruent to ST, RT is congruent to RT, and QR is congruent to SR.
All these sides are congruent to each other that gives the proof of "SSS(SIDE, SIDE, SIDE)" 

What is 1,400,000 multiplied by 3.5x10^5 expressed in scientific notation?

Answers

4.9x10^11.
One can solve this question by converting 1,400,000 into scientific notation. The equation then becomes --> (1.4x10^6)(3.5x10^5). Then, one can multiply 1.4 by 3.5 and use exponent laws to get x10^11.
1.4x3.5 = 4.9
(10^6)(10^5)=10^11
Therefore, the answer will be 4.9x10^11.

The answer is [tex]\( 4.9 \times 10^{11} \)[/tex].

To solve the given mathematical problem, we will multiply the two numbers and then express the result in scientific notation.

First, let's multiply 1,400,000 by 3.5x10^5 without converting them to scientific notation:

[tex]\[ 1,400,000 \times 3.5 \times 10^5 \][/tex]

[tex]\[ = 1400000 \times 3.5 \times 10^5 \][/tex]

[tex]\[ = 4900000 \times 10^5 \][/tex]

Now, we have the product 4900000. To express this in scientific notation, we must write it as a number between 1 and 10 multiplied by a power of 10. The number 4900000 can be written as 4.9 followed by 11 zeros, which in scientific notation is [tex]\( 4.9 \times 10^{11} \)[/tex].

Therefore, the final answer, expressed in scientific notation, is:

[tex]\[ \boxed{4.9 \times 10^{11}} \][/tex]

The number of animals in a population is 775, and it increases by of 51% each year.
a. Model the situation with an exponential function.

b. Find how many animals there will be in 10 years.

c. How many years will it take for the population to become 1150.

Show all work!

Answers

Answer(a):

Exponential growth formula is given by

[tex]A=P(1+r)^t[/tex]

Where preset population = P= 775

Rate of increase = r = 51% = 0.51

t= number of years

A= Future value.

Plug these values into above formula:

[tex]A=775(1+0.51)^t[/tex]

[tex]A=775(1.51)^t[/tex]

Hence required exponential function is [tex]A=775(1.51)^t[/tex]


Answer(b):

plug t=10 years

[tex]A=775(1.51)^t=775(1.51)^{10}=775(61.6267795034)=47760.7541151[/tex]

which is approx 47761.


Answer(c):

Plug A=1150

[tex]1150=775(1.51)^t[/tex]

[tex]\frac{1150}{775}=(1.51)^t[/tex]

[tex]\ln(\frac{1150}{775})=t*\ln(1.51)[/tex]

[tex]0.394654192004=t*0.412109650827[/tex]

0.957643654334=t

Which is approx 1 year.

Write the equation in slope-intercept form of the line that has a slope of -5 and a y-intercept of 2.

Answers

Hi!

Slope intercept form is in the form y=mx+b
m is the slope, and that is given so we can plug that into the equation

y = -5x + b

We are also given the y-intercept (0,2) and we can plug that into the equation as well, to find b

2 = 5(0) + b
2 = b

So now that we know both m and b, plug only those two into the equation.
y = -5x + 2

That is your equation

Shari plans to bake cherry pies and sell them for $9.50 each how much pies dose she have to sell to make $100 profit

Answers

at less 10 pies. hope this helps

What is the value of b in the equation (yb) 4= 1/y24

Answers

Answer:

The value of b is [tex]\frac{1}{y^7}[/tex].

Step-by-step explanation:

Here the given expression is,

[tex](yb)^4=\frac{1}{y^{24}}[/tex]

[tex]y^4b^4=\frac{1}{y^{24}}[/tex]  ( Using [tex](ab)^m=a^mb^m[/tex] on left side )

[tex]y^4b^4y^24 = 1[/tex]             ( By cross multiplication )

[tex]y^{4+24}b^4=1[/tex]               ( Using [tex]a^ma^n=a^{m+n}[/tex] on left side )

[tex]y^{28}b^4=1[/tex]

[tex]b^4=\frac{1}{y^{28}}[/tex]

[tex]b=(\frac{1}{y^{28}})^{\frac{1}{4}}[/tex]   ( [tex]a^m=b^n\implies a=b^\frac{n}{m}[/tex] )

[tex]b=\frac{1^{\frac{1}{4}}}{(y^{28})^\frac{1}{4}}[/tex]  ( [tex](\frac{a}{b})^m=\frac{a^m}{b^m}[/tex] )

[tex]b=\frac{1}{y^{28\times \frac{1}{4}}}[/tex]   ( [tex](a^m)^n=a^{m\times n}[/tex] )

[tex]b=\frac{1}{y^7}[/tex]

Answer:

It is -6

Step-by-step explanation:

The distance formula is d = rt. A trip of 92 miles traveled at 65 mph will take 1.35 hours.
A. True
B. False

Answers


65 * 1.35 = 87.75

87.75 does not equal 92
 so this is False

13 Pts

PLEASE SOMEONE HELP ME WITH THIS QUESTION
PLZ EXPLAIN

THANK U

Answers

It's the third one and the last one are the only ones that make immediate sense.
The answer is 3n+2

She starts off with 2 in the first hour

And then every additional hour ( represented with n) she designs 3

what is 85% of 2500 meters

Answers

2500*0.85=2125 meters

Solve the system algebraically. Check your work.

4x + 2y = 10
3x + 2y = 6

ANSWER: {(
a0)}

Answers

Hey there! :D

We can subtract the equations from each other. 

4x-3x=x

2y-2y=0

10-6=4 

x=4 <== that's all we have left of the equation

Now plug that in to solve.

3(4)+2y=6

12+2y=6

2y=-6

y=-3

Solution: (4,-3)

I hope this helps! 
~kaikers

Answer:

x = 4 and y = -3.

Step-by-step explanation:

Given  : 4x + 2y = 10  and 3x + 2y = 6.

To find : Solve the system algebraically. Check your work.

Solution : We have given that

4x + 2y = 10 ----(1)

3x + 2y = 6.------(2)

Subtracting equation 2 from 1

4x + 2y = 10

(-)3x + (-)2y =(-) 6.

_____________

x + 0 =  4

x =4

Plug x = 4 in equation 1

4 (4) + 2y = 10.

16 + 2y = 10.

2y  = 10 -16.

2y  = -6.

On dividing by 2 both sides

y = -3.

Check:

Plug the values x =4 , y =-3 in equation 1

4 (4) + 2 ( -3) = 10

16 -6 = 10

10 =10

Verify,

Therefore, x = 4 and y = -3.

For what values of x is x2 + 2x = 24 true?

–6 and –4
–4 and 6
4 and –6
6 and 4

Answers

C. 4 and -6.

You'll subtract the 24 to the other side, causing it to be negative.
Ask yourself.. What plus what equals a positive two, but gives me a negative 24? well, 24 breaks into 12 and 2, or 6 and 4. well 12 subtracted by 2 does not get me 2, it gives me ten. but a positive 6 subtracted by 4 gives me a positive 2, and negative 24.
Hope this helps!! :)

Answer:

C. is the correct answer i took  the quiz

Step-by-step explanation:

helppppppppppppppppppppppppp

Answers

Answer:
x = 10

Explanation:
Note the following rules before we begin:
2 ln(a) = ln (a²)
ln (a) + ln (b) = ln (ab)

Now, for the given:
ln(20) + ln(5) = 2 ln(x)
ln(20*5) = ln(x²)
ln(100) = ln(x²)

This means that:
100 = x²
Therefore:
either x = 10 .........> acceped
or x = -10 .........> rejected as no negatives are allowed within ln functions

Hope this helps :)

What is the quotient (2x3 − 13x2 + 16x − 5) ÷ (x − 5)?


2x2 − 3x + 1

2x2 + 3x − 1

2x2 − 3x − 1

2x2 + 3x + 1

Answers

Answer:

Correct choice is A

Step-by-step explanation:

1 step. Multiply [tex]x-5[/tex] by [tex]2x^2[/tex] to get [tex]2x^3-10x^2[/tex] and subtract this polynomial from the polynomial [tex]2x^3-13x^2+16x-5:[/tex]

[tex]2x^3-13x^2+16x-5-(2x^3-10x^2)=2x^2-13x^2+16x-5-2x^3+10x^2=-3x^2+16x-5.[/tex]

2 step. Multiply [tex]x-5[/tex] by [tex]-3x[/tex] to get [tex]-3x^2+15x[/tex] and subtract this polynomial from the polynomial [tex]-3x^2+16x-5:[/tex]

[tex]-3x^2+16x-5-(-3x^2+15x)=-3x^2+16x-5+3x^2-15x=x-5.[/tex]

3 step.  Multiply [tex]x-5[/tex] by [tex]1[/tex] to get [tex]1[/tex] and subtract this polynomial from the polynomial [tex]x-5:[/tex]

[tex]x-5-(x-5)=x-5-x+5=0.[/tex]

Then

[tex]2x^3-13x^2+16x-5=(x-5)(2x^2-3x+1).[/tex]


Answer:

Correct answer is 2x2 − 3x + 1

Step-by-step explanation:

The number 64 is a perfect

A.square and cube
B.square
C.cube

Answers

The answer to this question is A.

The prime factorization of 64 is [tex]2^6[/tex]

This can be written in two ways.

[tex]64=2^6=2^3 \times 2^3 = 8 \times 8 = 8^2[/tex]
[tex]64=2^6=2^2 \times 2^2 \times 2^2=4 \times 4 \times 4=4^3[/tex]

Thus, 64 is both a perfect square and perfect cube. Hope this helps! :)
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Nonpolar molecules that cluster away from water molecules are called __________ molecules. German conquered west Rome, why did they fail to inherit the roman achievement and rule west rome? Adeeb bought 5 oranges and 15 apples from the farmer's market. The equation 5r+15a=10.5 represents the amount of money he spent. Faye bought 12 oranges and 11 apples, represented by the equation 12r+11a=11.45 . What was the cost of each apple Who benefited the most from the triangular trade? how did this trade route lead to the establishment of slavery in the americas ? Which of the following sentences is an example of a complex sentence? Select all that apply.A. I like to read adventure stories, not poems.B. I like to read adventure stories and poems.C. I like to read adventure stories, but I don't like to read poems.D. I like to read adventure stories but not poems.E. I like to read adventure stories more than poems On any given day, within ten minutes of waking up, you probably depend on more than 100 strangers to provide electricity, water, natural gas, weather forecasts, and other services. according to durkheim, this interdependence gives rise to: Neon has 10 electrons and krypton has 18 electrons which element do you think has a greater chance of forming a momentary dipole and why select the correct product (x2+3)(x3-5) solve the equation x-5=15 and state Euclid's axiom used Name the sets of numbers to which -1/2 belongs A.integers,rational numbersB.whole numbers,natural numbers, integersC.whole numbers,integers,rational numbersD.rational numbers Which two stimuli did John B. Watson associate in his infamous Little Albert experiment? A. a white lab rat and the boys mother B. fear and a loud noise C. a white lab rat and a loud noise D. fear and the boys mother At the beginning of the novel, why doesn't Ponyboy have anything nice to say about Darry when Cherry asks about him? If a doughnut contains 1.8 moles of sugar (C6H12O6), how many sugar molecules are in a box of one dozen doughnuts? The inheritance pattern for snapdragon flower color exhibits incomplete dominance. a snapdragon that is homozygous for the red allele is crossed with a snapdragon that is homozygous for the white allele. what is the phenotypic outcome of the offspring that result from this cross? 18m-9v+6v-7m hope you can help Robert siegler's "wave" theory of infant cognitive development is a response to piaget's emphasis on As DNA is replicated, which DNA base pair will bond to cytosine Calculate the volume in ml of 0.20m naoh needed to react completely with 100.ml of 0.040m acetic acid. Which information below could be printed under Both in the Venn diagram?a.one vote per statec.two branches of governmentb.three branches of governmentd.no votes for individual states "__________ is the act of using quotas or tariffs to shield one or more industries within a country's economy from foreign competition"