. Marcy has a 70% average in her class going into the final exam. She says "I need to get a 100% on this final so I can raise my score to 85%." Is she correct?

Answer:  454

Step-by-step explanation:

The first three digits will be the significant digits.  Round the third digit.

454.12

the digit and the 4 is 1 so 454.12 is rounded to 454

How much is 22 out of 28 written as a percentage? Convert fraction (ratio) 22 / 28 Answer: 78.571428571429%

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Answer:

4x^2 + 28x - 80=0

Step-by-step explanation:

(2x+4)(2x+10) = 120

1. Use FOIL (Distribute):

4x^2 + 20x +8x + 40 = 120

2. Group like terms:

4x^2 + 28x+ 40 = 120

3. Subtract 120 from both sides:

4x^2 + 28x - 80 = 0

Answer:

Option 3 - [tex]4x^2+28x-80=0[/tex]

Step-by-step explanation:

We have given,

The length of a rectangular frame is represented by the expression L=2x+4.

The width of the rectangular frame is represented by the expression B=2x+10.

The total area of a rectangular frame is A=120 square inches.

To find : Write an equation to solve for the width of a rectangular frame ?

Solution :

The area of the rectangle is given by,

[tex]\text{Area}=\text{Length}\times \text{Breadth}[/tex]

Substitute the values,

[tex]120=(2x+4)\times(2x+10)[/tex]

[tex]120=4x^2+20x+8x+40[/tex]

[tex]4x^2+28x+40-120=0[/tex]

[tex]4x^2+28x-80=0[/tex]

The required equation is [tex]4x^2+28x-80=0[/tex]

Therefore, option 3 is correct.

The number -1 is its own multiplicative inverse, just like the number 1, because multiplying -1 by itself results in 1.

The number 1 is indeed its own multiplicative inverse because when you multiply it by itself, you get 1. The property of a number being its own multiplicative inverse means that the number multiplied by itself equals 1. There is another number with this property, which is -1. When you multiply -1 by itself (-1  x -1), the result is 1. Therefore, -1 is also its own inverse when it comes to multiplication.

This concept is rooted in the properties of identity elements and inverses within the mathematical field of abstract algebra. When considering the set of numbers 1 and -1, they form an abelian group under the operation of multiplication. In this group, every element is its own inverse, and the identity element for multiplication is 1, as any number multiplied by 1 yields the original number.

Answer:

y = 3x + 9

Step-by-step explanation:

9 = 3[0] + b

0

9 = b

y = 3x + 9

This would be considered a parallel line, so 3 remains the way it is.

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Answer:

17.24

Step-by-step explanation:

Simple subtraction of decimals because the other runner was faster:

23.10

-5.86

=

17.24

The other Runner's time ​is 17.24 seconds.

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

Operators which let do a basic mathematical calculation

+ Addition operation: Adds values on either side of the operator.

For example 12 + 2 = 14

- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.

for example 12 -2 = 10

* Multiplication operation: Multiplies values on either side of the operator

For example 12*2 = 24

Given that Anna's running time for a race was 23.1 seconds

And another runner's time was 5.86 seconds faster

It took Anna 23.1 seconds to complete a race.

Since the other runner was quicker,

So we did a simple decimal subtraction,

⇒ 23.10 - 5.86

⇒ 17.24

So, It took other runners 17.24 seconds to complete a race.

Hence, the other Runner's time ​is 17.24 seconds.

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Let P = perimeter

P = 3x + 5

Let x = 10

P = 3(10) + 5

P = 30 + 5

P = 35

Answer:

Option A k=5

Step-by-step explanation:

step 1

Find the equation of f(x)

we have the points

(-10,-6) and (0,4)

Find the slope m

[tex]m=(4+6)/(0+10)=1[/tex]

The function in slope intercept form is equal to

[tex]f(x)=mx+b[/tex]

we have

[tex]m=1[/tex]

[tex]b=4[/tex] -----> the point (0,4) is the y-intercept

substitute

[tex]f(x)=x+4[/tex]

step 2

Find the equation of g(x)

we have the points

(-2,-6) and (0,4)

Find the slope m

[tex]m=(4+6)/(0+2)=5[/tex]

The function in slope intercept form is equal to

[tex]g(x)=mx+b[/tex]

we have

[tex]m=5[/tex]

[tex]b=4[/tex] -----> the point (0,4) is the y-intercept

substitute

[tex]g(x)=5x+4[/tex]

step 3

Find the value of k

we have

[tex]f(x)=x+4[/tex]

[tex]g(x)=5x+4[/tex] -----> equation A

[tex]g(x)=f(kx)[/tex] -----> equation B

[tex]f(kx)=kx+4[/tex] ----> equation C

substitute equation A and equation C in equation B and solve for k

[tex]kx+4=5x+4[/tex]

[tex]kx-5x=0\\kx=5x\\k=5[/tex]

The value of k in the equation g(x) = f(k*x), where g(x) and f(x) are graphs, signifies a horizontal compression, expansion, or reflection of the f(x) graph. It depends on the given graph to determine the exact value of k.

Without the graphical representation, it's difficult to provide a definite value for k. However, understanding the relationship between f(x) and g(x) can help us make an educated guess. If g(x) is a horizontal compression of f(x) by a factor of k, then k is positive and larger than 1. If g(x) is a horizontal expansion of f(x), then k is positive and less than 1. If g(x) is a reflection of f(x) across the y-axis and has a horizontal compression or expansion, then k is negative. For example, if g(x) completes one cycle in a space where f(x) would complete 5 cycles, then k is 5. If g(x) completes 5 cycles in a space where f(x) would complete one cycle, then k equals 1/5.

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Answer: 5

Step-by-step explanation: -2+7=5

when the signs are different you subtract and when the signs are the same you add. Then you keep the sign of the bigger number.

There are 52 legs and they all belong to hamsters. so 13 Hamsters are there​.

Total No. of legs = 52

Each hamsters have 4 legs.

No. of Hamster = 52/4 =13 Hamsters

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Answer:

12:8

Step-by-step explanation:

The ratio of biographies to histories is 1.5, or more simply as a whole number ratio, 3:2. This means that for every 3 biographies, there are 2 history books.

The question wants us to calculate the ratio of the number of biographies to the number of histories in the book display. To do this, simply divide the number of biographies by the number of histories. The problem provides the number of biographies as 12 and the number of histories as 8. Thus, the ratio is: 12 (biographies) / 8 (histories) = 1.5.

In other words, for every 1.5 biographies, there is 1 history book on the display. However, since ratios are commonly expressed as whole numbers, we can multiply both sides by 2 to get the ratio as 3:2, meaning for every 3 biographies, there are 2 history books. This provides a cleaner and more interpretable ratio.

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Answer:

.25x+1.75=15 and x=53

Step-by-step explanation:

first subtract 1.75 from both sides

then divide by .25 on both sides

and you will get x=53

Answer: the answer is 22 with a remander of 6

Step-by-step explanation:

Answer:

D.) -3x = 4y

Step-by-step explanation:

[tex] -3(-4) ≠ 4(-3) \\ \\ 12 ≠ -12[/tex]

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The point (-4,-3) is not a solution to both Equation C: 2y-3x=6 and Equation D: -3x=4y. This is determined by substituting x with -4 and y with -3 in each equation and checking if the equation is balanced.

To find which equation (-4,-3) is not a solution to, we substitute x with -4 and y with -3 into each equation, then see if both sides of the equation are equal.

So, (-4,-3) is not a solution to both Equation C: 2y-3x=6 and Equation D: -3x=4y.

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Answer:x= -2

Step-by-step explanation:

Answer:

-4 10/13

Step-by-step explanation:

-52-8m = 10 + 5m

-8m = 62 +5m

-13m = 62

-m = 62/13

m = - 62/13

m = -4 10/13

Answer:

300

Step-by-step explanation:

Divide 3000 by 10 by striking out each zero one-by-one [300 ÷ 1] to get 300. This is one of the fastest ways to solve with zeros.

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The result would be 300 units and 320 units respectively.

3 thousand divided by 10 in unit and standard form:

To divide 3,000 by 10 in unit form: 3,000 ÷ 10 = 300 units.

To divide 3,000 by 10 in standard form: 3.2 × 10³ ÷ 10¹ = 3.2 × 10² = 320 units.

Answer:

20 apple pies

Step-by-step explanation:

On Saturday they sold 16, while on Sunday they sold 4 more.

16+4 = 20.

20 apple pies.

Answer:

all work is shown and pictured

Answer:

x=2, y=11.

Step-by-step explanation:

x + y = -9.  

5x - 2y = 32   Multiply the first equation by 2:

2x + 2y = -18   Adding the last 2 equations to eliminate y:

7x =  14

x = 2,

Substitute x = 2 in the first equation:

2 + y = -9

y = -9 - 2

y = -11.

The number of calories by a 37​-member platoon of​ soldiers will be 6,48,24000 calories.

A calorie is a unit of energy. Energy is defined as the capacity to do work.

Now it is given that,

Calories contain in 1 MRE = 1,600

Number of MREs taken by a soldier per day = 3

Therefore, number of calories taken by soldier per day = 3*1600

                                                                                            = 4800 calories

Therefore, number of calories taken by 37 soldier per day = 37*4800

                                                                                           = 1,77,600 calories

Now since, 12 months = 365 days

⇒Number of calories taken by 37 soldier in 12 months = 365*1,77,600

⇒Number of calories taken by 37 soldier in 12 months =6,48,24000 calories.

Hence,The number of calories by a 37​-member platoon of​ soldiers will be 6,48,24000 calories.

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Answer:8in

Step-by-step explanation:

You will multiply 2in•4in=8in

Answer:

Step-by-step explanation:

| n+2 | = 7    : n+2 = 7   or  n+2 = -7

n=5  or n = - 9

Given that Henry can write 5 pages in 3 hours, his rate is 5/3 pages per hour. Multiplying this rate by 8 hours, we get approximately 13.33 pages. Therefore, Henry can write approximately 13 to 14 pages in 8 hours at the given rate.

The subject of this question is mathematics, specifically, it is dealing with the concept of rates. Given that Henry can write 5 pages in 3 hours, we can set up a rate, which is simply a ratio that compares quantities in different units. So, Henry's rate of writing is 5/3 pages per hour.

To find out how many pages Henry can write in 8 hours at this rate, we multiply his rate (5/3) by the number of hours (8 hours). So, (5/3) x 8 = 40/3 = 13.33. However, since we cannot have a fraction of a page, we can round this to 13 pages for a conservative estimate or to 14 pages for a liberal estimate.

So, at the rate given, Henry can write approximately 13 to 14 pages in 8 hours.

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Henry can write approximately 13.33 pages in 8 hours.

To find out how many pages Henry can write in 8 hours, we can set up a proportion using the given information.

Since Henry can write 5 pages in 3 hours, we can write the proportion as 5/3 = x/8.

To solve for x, we can cross multiply and then divide to find that x = 40/3.

So, Henry can write approximately 13.33 pages in 8 hours.

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Answer:

Its Brand 2 :) also do you do connexus?

if so whats ur name :)

Step-by-step explanation:

Answer:

brand 4

Step-by-step explanation: