14. teacher needs 70 lengths of string cut to 40 cm each. If balls of string are 10m longhow many balls will be needed.

Answers

Answer 1

Answer: 70×40=2800cm which is the total amount of cm that the teacher needs

10m = 1000cm

$(2800)/(1000)$ = 2.8

there will be 3 balls of string

Answer 2

Answer: 70×40=2800 cm, which would be the total amount of cm that the teacher needs for the balls.

10m = 1000cm

= 2.8

There will be 3 balls of string.

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How can I solve this system of linear equation by substitution 3x+y=11 and -2x+y=1

Answers

We can answer this question by solving each equation for one variable, and then substituting.

3x + y = 11 Given
y = -3x + 11 Subtract 3x from both sides

This equation is now solved for y. Now, let's do the other equation. Make sure to solve it for the same variable.

-2x + y = 1 Given
y = 2x + 1 Add 2x to both sides

Now, let's set both equations equal to each other, since they both equal y.

2x + 1 = -3x + 11 Set both equations equal to each other
1 = -5x + 11 Subtract 2x from both sides
-10 = -5x Subtract 11 from both sides
2 = x Divide both sides by -5

Now, let's substitute x in for one of the equations we found earlier, so that we can find y.

y = 2x + 1 Given
y = (2)(2) + 1 Substitute the x-value, 2
y = 4 + 1 Multiply
y = 5 Add

So, x = 2 and y = 5.

Hope this helps!

First will make Equation take on the form of y = mx + b. I've cchosen the second Equation:

y = 2x + 1

Now substitute this equation in for y into the other equation and solve:

3x+y = 11
3x+ (2x + 1)=11
5x + 1 = 11
5x = 11 - 1
5x/5= 10/5
x = 2

You can now plug this x-value back into either equation, and solve for y:

y = 2(x) + 1
y = 2(2) + 1
y = 5

Jack buys a bag of 5 apples each equal in size he eat 1/2 of one Apple what fraction did he eat

Answers

You have $4(1)/(2)$ apples left.
You have 5 whole apples, you took one whole apple out, which equals 4 whole apples left. Then with the whole apple you took out, you ate $(1)/(2)$ of it.
Jack ate $(1)/(2)$ of an apple in 5 apples.
If you say that Jack ate $(1)/(2)$ of 3 apples, then he ate $1(1)/(2)$ apples. So there isn't any difference when he ate $(1)/(2)$ of an apple.

Mikasi and Julie are determining which size sports drink is the better buy per ounce: a 16-ounce bottle for $1.95 or a 36 ounce bottle for $3.05. Who is correct? Explain.Mikas: 16-oz bottle: 12.2¢ per ounce
36-oz bottle: 8.5¢ per ounce

Julie: 16-oz bottle : 8.2¢ per ounce
36-oz bottle: 11.8¢ per ounce

EXPLAIN!!!!

Answers

Mikas is correct because 12.2 x 16 is 195.2, which estimated is 195, and then 8.5 x 36 is 306, which is close enough to the answer. I hope I helped.:)

In what type of situation is it easy to compare two numbers written in scientific notation?Give an answer in a complete sentence.

Answers

To compare two numbers given in Scientific notation, first compare the exponents. The one with the greater exponent will be greater. If the exponent is the same, compare the two numbers that are being multiplied by comparing their decimals.

Using the numbers 2,3,5,8 ounce to make an equation to equal 104

Answers

Do you mean ounce or once

Is 5(2x-3y) equivalent to 10x - 3y? Please help me

Answers

The answer would be false.

No its not because 5(2x-3y) is 10x-15

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