Mathematics Middle School

Y = 2x - 1 and y = x + 3 find the solution by graphing or substitution

1. ( 4,7)
2. ( 7,4)
3. ( -7,-4)
4. Infinite solutions

Answers

Answer 1
The answer is the 3rd one
Answer 2

Answer:

Ripboodap9urmy you are wrong utterly wrong. I had a feeling you were guessing why would you say it's the third choice out of the blue

Step-by-step explanation:

And person who's asking this believe me it is (4,7) I ligit just took the test and got it correct and it's the first choice.

Plzz give me brainlist!!

Related Questions

Haley has some cubes each cube has a side length of 4 inches what is the volume in cubic inches of each cube

Answers

Volume of a cube is a^3 so 4^3=64in^3
the formula for Volume is
V=s*s*s
where s represents a side
so...
V=4in.*4in.*4in.
4*4*4=64
V=64 in. cubed

If 400 bricks measuring 81" by 31" are required to build a wall 42 ft. high, how long is the wall? feet.

Answers

let b bricks:

b= 400, let  H height and l length

Area = 81*31 or 6.75*2.58 = 17.44 ft²

b(17.44ft²)=Hl

400(17.44 ft²) =42 l

l= 6975/42 = 166.07 

so the length of the wall is 166 ft approximately as a whole number




Given a mean of 61.2 and a standard deviation of 21.4 what is the z score of the value 90 rounded to the nearest tenth?

Answers

Answer:

The z-score of 90 is 1.35

Step-by-step explanation:

The z-score is calculated using the formula:

[tex]z = \frac{x - \mu}{ \sigma} [/tex]

From the question, it was given that the mean is

[tex] \mu = 61.2[/tex]

and the standard deviation is

[tex] \sigma = 21.4[/tex]

and x=90.

We substitute the given values to obtain:

[tex]z = \frac{90 - 61.2}{21.4} [/tex]

[tex]z = \frac{28.8}{21.4} = 1.35[/tex]

Answer:

1.35

Step-by-step explanation:

Kristen has 64 coins in her bank. She has $9.25 in dimes and quarters. How many dimes and quarters does she have?

Answers

d= # of dimes
q= # of quarters

QUANTITY EQUATION:
d + q= 64

COST EQUATION:
0.10d + 0.25q= $9.25


STEP 1:
multiply quantity equation by -0.10 to be able to eliminate the d term in step 2

(-0.10)(d + q)= (-0.10)(64)
-0.10d - 0.10q= -6.40


STEP 2:
add equation from step 1 to cost equation to eliminate the d term and solve for q

Add
0.10d + 0.25q= $9.25
-0.10d - 0.10q= -6.40

0.15q= 2.85
divide both sides by 0.15

q= 19 quarters


STEP 3:
substitute q value in step 2 into either original equation to find d value

d + q= 64

d + 19= 64
subtract 19 from both sides

d= 45 dimes


CHECK:
0.10d + 0.25q= $9.25
0.10(45) + 0.25(19)= 9.25
4.50 + 4.75= 9.25
9.25= 9.25


ANSWER: There are 45 dimes and 19 quarters.

Hope this helps! :)

simplified form of the expression (5.23x + 3.76) − (3.67x − 6.39)

Answers


[tex]5.23x + 3.76 - 3.67x + 6.39 \\ = 1.56x + 10.15[/tex]

Answer:

1.56x + 10.15

Step-by-step explanation:

(5.23x + 3.76) – (3.67x – 6.39)

(a + b) – (c – d) = a + b – c + d

Remove the parentheses and change the signs as needed:

5.23x + 3.76 – 3.67x + 6.39.

Group the like terms and simplify:

5.23x – 3.67x + 3.76 + 6.39

1.56x +10.15.

The simplified form of (5.23x + 3.76) – (3.67x – 6.39) is 1.56x + 10.15.

Please help is the answers is 6

Answers

The answer is A. Multiply by 3

Round 5685 to the nearest 100

Answers

The nearest hundred would be mostly the numbers "685".. We know that anything 50 and greater rounds to the next number, so since 85 > 50, we can round that up to 700. Adding the 5000, it would be 5700

what number should you subtract from the numerator of the fraction 52367/47633 and add to the denominator so that, after reducing, you get 17/38

Equation needed too!

Answers

The number you should subtract from the numerator (52367) and add to the denominator (47633) of the fraction 52367/47633 to obtain 17/38 after reducing is 21,458.

The equation is:

(52367 - 21458) / (47633 + 21458) = 17/38

To solve this problem, we need to find the number that, when subtracted from the numerator (52367) and added to the denominator (47633), will result in a fraction that reduces to 17/38.

Let's call this number x.

Step 1: Subtract x from the numerator and add x to the denominator.

(52367 - x) / (47633 + x)

Step 2: Set the resulting fraction equal to 17/38 and cross-multiply.

(52367 - x) / (47633 + x) = 17/38

(52367 - x) × 38 = 17 × (47633 + x)

Step 3: Solve for x.

1,990,946 - 38x = 810,761 + 17x

1,180,185 = 55x

x = 21,458

Therefore, the number you should subtract from the numerator (52367) and add to the denominator (47633) to obtain 17/38 after reducing is 21,458.

The equation representing this process is:

(52367 - 21458) / (47633 + 21458) = 17/38

The height of a model rocket is 4.5% of the height of the actual rocket. The model is 1.32m high. How high is the actual rocket? Please show your work.

Answers

1.32 meters = 4.5%x

x is the actual height of the rocket.

4.5% is really 0.045 (move the decimal place 2 times to the left).

1.32 = 0.045x
Divide both sides by 0.045.

x = 29.3

The height of the actual rocket is 29.3 meters.

To find the height of the actual rocket given the height of the model rocket, we can use the ratio between the two. By setting up and solving a simple equation, we can determine that the height of the actual rocket is 29.33 meters.

To find the height of the actual rocket, we need to start by determining the ratio between the height of the model rocket and the actual rocket. Given that the model rocket is 4.5% of the height of the actual rocket, we can use this ratio to solve for the height of the actual rocket.

Let's denote the height of the actual rocket as x. Since the model rocket is 4.5% (or 0.045) of the actual rocket's height, we can set up the equation:

0.045x = 1.32

To solve for x, we divide both sides of the equation by 0.045:

x = 1.32 / 0.045

Calculating this expression gives us the height of the actual rocket as 29.33 meters.

How would I set up the equation to find mRQS on this circle?

Answers

mRQS=360-mSR. or mRQS=31x+13...To solve the measure of the minor arc RQS you would use this... 31x+13+(6+18x/2. )=360.

Solve for r.
k=ar/p

a r=ka/p
b r=kap
c r=kp/a
d r=a/kp

Answers

solve for r by simplifying both sides of the equation, then isolating the variable.
[tex]r= \frac{kp}{a} [/tex]

hopefully i was of help, please mark brainly is possible

If the sum of three numbers is 144, what is the average of the three numbers?

Answers

 For 33, add consecutive odd numbers until the sum is greater than 33: 3 + 5 ... more efficient and which (if used properly) find all the answers for a given "n". ... 33 as the sum of 3 consecutive odd integers whose average is 11.

Luther won 12 of the last 20 video games he played.

Suppose Luther plays a total of 60 games with his friends over the next month. Predict how many of these games Luther will win.

Answers

36 games. 20x3 is 60 and 12x3 is 36

Find the quotient: 744 ÷ 3.1
A) .024
B) 2.4
C) 24
D) 240

Answers

I think the answer is d)240
The answer is D) 240.

744 / 3.1 = 240
Check
3.1 * 240 = 744

744 = 744

Hope this helps you! (:
-Hamilton1757

The measure of angle x is 25 more than 4 times the measure of its complement. Find the measure of x.

Answers

- Two angles that are complements of each other add to equal 90 degrees (they are complementary angles). 
- One angle measures x degrees.
- The other angle measures 25 more than 4 times the angle that measures x degrees; it measures 4x + 25 degrees.

To find x, set the sum of these expressions (x and 4x + 25) equal to 90 and solve algebraically for x.

90 = x + (4x + 25)
90 = x + 4x + 25
90 = 5x + 25
65 = 5x
13 = x

If you wanted to find the measure of angle x, you'd substitute 13 for x in its expression, 4x + 25.

4x + 25
4(13) + 25
52 + 25
77

Answer:
x = 13
m∠x = 77°

He counted 206 wheels and 170 pedals. How many bicycles and tricycles does he have.

Answers

bicycle has 2 wheels and 2 pedals
 tricycle has 3 wheels and 2 pedals

EQ 1 : 2b + 2t = 170 pedals

 EQ 2: 2b +3t = 206 wheels

subtract  EQ 1 from EQ 2

2b +3t = 206 - 2b + 2t = 170 = t=36

 there were 36 tricycles

36 x 2 = 72 pedals

170 pedals - 72 = 98 pedals left
98/2 = 49 bicycles

36 Tricycles and 49 bicycles




the difference between the product of 6 and a number and negative two times the number

Answers

Will equal 8 times that same number. This is because you have 6x and are subtracting -2x. Subtracting a negative is like adding a positive. 

The average pay of employees is $399.44 per week at a local True Value Hardware store. Jay Miller earns $411.11 per week. How much is Jay's pay over the average?

Answers

The Answer is. $11.67
Final answer:

To calculate how much more Jay Miller's weekly salary is compared to the average, subtract the average weekly salary ($399.44) from Jay's weekly salary ($411.11). The difference is $11.67, which is how much Jay's weekly pay is over the average.

Explanation:

The question is asking us to calculate how much more Jay Miller's weekly salary is compared to the weekly average salary of employees at the local True Value Hardware store. The step-by-step process to solve this is very simple. Firstly, we will subtract the average weekly salary from Jay's weekly salary.

The average weekly salary is $399.44.Jay's weekly salary is $411.11.Subtract the average weekly salary from Jay's weekly salary:
$411.11 - $399.44 = $11.67

So, Jay's weekly pay is $11.67 over the average.

Learn more about Salary Difference Calculation here:

https://brainly.com/question/874160

#SPJ11

Please help my answer is c, is this right!

Answers

I'm not sure how you got c but the way you would solve this is for every x on the line plot you would add that amount. You don't need to worry about 0 because 0 is nothing.
There are 3 X's at 1/4 so you would add 1/4+1/4+1/4=3/4. There are 2 X's at 1/2 so you would add 1/2+1/2=1. There are 2 X's at 3/4 so you would add 3/4+3/4=1.5. There is 1 X at 1 so it would just be 1. Then add all those together 3/4+1+1.5+1=4.25 or you could just add each X as you come across it on the number line like so:
[tex]0.25 + 0.25 + 0.25 + 0.5 + 0.5 + 0.75 + 0.75 + 1 = 4.25[/tex]

What does volume mean

Answers

Volume is the amount of space inside a solid figure like a ball or a cube ect.

Hope this Helps!!
Volume is the amount of space an object has

Cody and Ashley are helping their dad fertilize the lawn. They have 3 1/3 pounds of fertilizer and 3 buckets. Each bucket will get the same amount of fertilizer. Cody measures 1 pound of fertilizer into each bucket. The following equation represents this situation, where x represents the additional amount of fertilizer each bucket will get. 3 (x+1) = 3 1/3

How much more fertilizer should each bucket get?
A. 1/9 of a pound
B. 2/3 of a pound
C. 2/9 of a pound
D. 1/3 of a pound

Answers

I believe your answer is A, one-ninth of a pound.

Answer:

1/9 pound

Step-by-step explanation:

the drawing is composed of a rectangle and a semicircle 18 cm 22 cm

Answers

What do you need?
The perimeter is L + w + L + perimeter of a semicircle.
L = 22 cm
W = 18 cm
Perimeter can be one of two answers. You need to specify where the semicircle is.  Formula for semicircle is
pi * r
r = 18/2 = 9 or
r = 22/2 = 11
So the perimeter of the semi circle is pi * 9 = 25.12 The total Perimeter = 22 + 22 + 18 + 25.12 = 87.12

It can also be 22 + 18 + 22 + 34.54 = 96.54 There are even more possiblities for perimeter. I would have the same problem if you asked about area.

Why not put more details in and I'l give you the correct answer. Here is what we need to know
1. Where is the circle on the 22 cm side or the 18 cm side?
2. What are you looking for: perimeter or area? As soon as you answer these I'll be back.

 

A recipe for cookies requires 2/3 cup of butter. Rama wants to make 3/4 of the recipe. How many cups of butter should Rama use to make the cookies?

Answers

Multiply the total amount of 2/3 cups by the portion size of 3/4.

= (2/3)(3/4)
multiply numerators; multiply denominators

= (2*3)/(3*4)
= 6/12
simplify by 6

= 1/2 cup


ANSWER: Rama should use 1/2 cup of butter.

Hope this helps! :)

If f(x)=6x^3+5x,g(x)=3x^2+5,and h(x)=9x^2-8 what is the degree of f(g(h(x))) awer choices are a.2 b.3 3.7 4.12

Answers

To find f(g(h(x))), we need to find g(h(x)) first. To do that we are going to evaluate the function g(x) at h(x):
We know that [tex]h(x)=9x^2-8[/tex] and [tex]g(x)=3x^2+5[/tex]
[tex]g(h(x))=g(9x^2-8)=3(9x^2-8)^2+5[/tex]
[tex]=3(81x^4-144x^2+64)+5[/tex]
[tex]=243x^4-432x^2+192+5[/tex]
[tex]=243x^4-432x^2+197[/tex]

Now that we know that [tex]g(h(x))=243x^4-432x^2+197[/tex], to find [tex]f(g(h(x)))[/tex] we are going to evaluate [tex]f[/tex] at [tex]243x^4-432x^2+197[/tex]
[tex]f(g(h(x)))=f(243x^4-432x^2+197)[/tex]
[tex]f(243x^4-432x^2+197)=6(243x^4-432x^2+197)^3[/tex][tex]+5(243x^4-432x^2+197)[/tex]

[tex]=86093442x^{12}-459165024x^{10}+1025681130x^8-1228219200x^6[/tex][tex]+83152048x^4-301780944x^2+45873223[/tex]

Since the degree of a polynomial is the highest degree of its monomials, we can conclude that the degree of f(g(h(x))) is 12

Answer:

The degree is 12

Step-by-step explanation:

George earns $455 per week. George recieves a 20% raise. How can george calculate his new weekly per rate?

Answers

There are two ways to calculate his new pay. Choose whichever is easier for you.

OPTION 1:
multiply current pay by 20%, then add the result to the current pay

Step 1:
multiply pay by 20% increase
=$455 * 20%
=$91 increase

Step 2:
add pay increase from step 1 to current pay rate

=$455 + $91
=$546 new weekly rate


OPTION 2:
multiply current pay by (1 + 20%)

=($455)(1 + 20%)
=(455)(1.20)
=$546 new weekly rate


ANSWER: His new weekly rate is $546 per week.

Hope this helps! :)

a regular triangular pyramid has a slant height of 13 mm on a base Edge length of 8 in

Answers

one hundred and four

Native Americans once lived near Cartersville, Georgia, in an area that is now a state park. They constructed burial mounds that often contained artifacts, such as beads, feathers, and copper ear ornaments. One of the park's mounds is 63 feet in height. Be a Math Detective. If the top of the mound is rectangular in shape with a perimeter of 322 yards, what could be the side lengths of the rectangle?

Answers

Final answer:

The sides of the rectangle atop of the mound could be multiple pairs of measurements. One such possible example is 100 yards by 61 yards which satisfy the perimeter equation, given the perimeter of the rectangle is 322 yards.

Explanation:

The question is asking about the side lengths of the rectangular top of an ancient mound in Cartersville, Georgia. This is a math problem that uses the concept of perimeter.

The perimeter of a rectangle is given by the formula: P = 2l + 2w where P is the perimeter, l is the length, and w is the width. We know that the perimeter of the rectangle is 322 yards. We can solve for the sides (length and width) by setting up equations using various combinations of numbers that, when plugged into the formula, result in a sum of 322.

It's important to note that we won't have a unique solution to this because a rectangle's perimeter doesn't determine its side lengths uniquely, but only within certain limits. So, there could be multiple correct answers.

For example, if we consider the length to be 161 yards, and the width to be 0 yards, it would still satisfy the perimeter equation. But since width cannot be zero, we can suppose the length to be longer side and width to be smaller, say 100 yards and 61 yards, which also add up to produce a perimeter of 322 yards. So, one possible solution is 100 yards by 61 yards.

Learn more about Mathematical problem of Perimeter here:

https://brainly.com/question/31699552

#SPJ12

Which is an equation of the given line in standard form?

A. -6x+5y=13
B. -6x+7y=-11
C. -6x+7y=11
D. -7x+6y=-11

Answers

The slope:
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

The coordinates of the points:
[tex](-3;\ -1)\to x_1=-3;\ y_1=-1;\ \left(\dfrac{1}{2};\ 2\right)\to x_2=\dfrac{1}{2};\ y_2=2[/tex]

Substitute:
[tex]m=\dfrac{2-(-1)}{\frac{1}{2}-(-3)}=\dfrac{3}{3\frac{1}{2}}=\dfrac{3}{\frac{7}{2}}=3\cdot\dfrac{2}{7}=\dfrac{6}{7}[/tex]

We have:
[tex]y=\dfrac{6}{7}x+b[/tex]

Substitute the coordinates of the point (-3; -1) to the equation of the line:

[tex]-1=\dfrac{6}{7}\cdot(-3)+b\\\\-1=-\dfrac{18}{7}+b\ \ \ |+\dfrac{18}{7}\\\\b=\dfrac{11}{7}[/tex]

Therefore we have:
[tex]y=\dfrac{6}{7}x+\dfrac{11}{7}\ \ \ |\cdot7\\\\7y=6x+11\ \ \ |-6x\\\\\boxed{-6x+7y=11}[/tex]

Answer: C. -6x + 7y = 11

there are a total of 122 countries in Africa, Europe, and North America. Europe has twice as many countries as North America, and Africa has seven more than Europe. How many countries are in each continent? write an equation and solve it to answer the question

Answers

E = 2N

A = E +  7 = 2n + 7

n + 2n + 2n +7 = 122

What is the value of x?

Enter your answer in the box.

x =

Answers

Hello!

A straight line measures to 180°

The angle that measures 134 and x make a straight line

180 = 134 + x

Subtract 134 from both sides

46 = x

The answer is 46°

Hope this helps!
Adjacent angles on a straight line sum up to 180.

x = 180 - 134 = 46°

Answer: 46°
Other Questions
Which of the two substances would have the higher boiling point ch4 or c? Which section comes FIRST in the Georgia State Constitution? the symptoms of tetanus are due to 1. In The Tall Woman and Her Short Husband which of the following best describes how most of the residents in Unity Mansions felt about Mrs.Tall and Mr.Short when they first moved to their community?A) greatly puzzledB) coolly indifferent C) sincerely surprised D) somewhat interested 2. Which of the following lines from The Tall Woman and Her Short Husband best supports the answer selected above? A) this was a mystery to the dozens of households living i. unity mansionsB)ever since this couple had moved in the old residents had eyes them curiouslyC) Toungues started wagging, especially in wet weather when the two of them went out and it was always Mrs. Tall who held the umbrella. If anything dropped to the ground,though, it was simpler for Mr Short to pick it up.D) and the neighbors remained S intrigued as at the start of this ill-assorted, inseparable couple. They went on making plau You have selected to place a direct mail piece with a local vendor that will include your message insert along with others. The vendor's mailing will reach 100,000 homes but only 50,000 are in your immediate marketing area. You would like to target only the 50,000 homes closest to your store, but would consider the full 100,000 home reach if it is cost effective. The cost for the production of the insert and mailing is $75 per 10,000 for the 50,000. There is also a $50 charge for using the 50,000 home reach. The cost for production of the insert and mailing is $55 per 10,000 for the 100,000. Calculate the total investment for this direct mail promotion for each option. What is the average kinetic energy kavg of the hydrogen molecules at a temperature of 100k? assume that the molecules have only three degrees of freedom at this temperature? Choose the Spanish equivalent to the command in parentheses. _____________ (eat) la manzana. Question 8 options: Come Como Comer Comas Plants maintain homeostasis by _____. Chewy Candy has a beginning inventory of $1,000 with a retail value of $1,800. June purchases were $3,000, with a retail value of $4,700 and retail sales were $4,200. What is the June 30 estimated ending inventory at cost under the retail method? When julie saw her brother being praised for cleaning his bedroom, she increasingly engaged in cleaning her own bedroom. this best illustrates the impact of? In heterosporous plants, _______ produce _______. select one:a. microgametophytes; eggsb. microgametophytes; spermc. microgametophytes; eggs and spermd. megagametophytes; sperme. megagametophytes; eggs and sperm Find the approximate circumference of a circle with a radius of 2.6 millimeters. Use = 3.14. Isabel created the tree diagram to represent the different ways she could order a salad at her favorite restaurant.According to the diagram, how many combinations of lettuce type, dressing, and topping are possible? Being informed about texas state government is ultimately the responsibility of There is 3\8 of a pizza in one box and 1/8 of a pizza in another box. How much altogether This is really confusing to me. I need help!! How many orbitals are found in the 3d sublevel? A. 1B. 3C. 5D. 7 What is the smallest natural number that 2, 10, 14, and 36 will divide evenly? The _________________ literally owns the Current Procedural Terminology (CPT) codes for all professions, meaning they wield enormous power because this is how all health professionals bill for their services. What two forces swept through europe after the french revolution? Over the decades local and global ice ages have lowered sea levels. As a result, there is often a decline in marine diversity due to