Choose a method that can be used to solve this system of equations by elimination.2x - 2y = 24
4x + 7y = -40

1. Subtract 2x from both equations and solve the first equation for y.

2. Multiply the first equation by -2 and add the second equation.

3. Add the first equation to the second equation and subtract 6x from both sides of the equation.

4. Subtract 7y from the second equation and add the first equation.

Which one of these steps is the correct way of solving by elimination?

Answers

Answer 1

Answer:

The method that should be selected is

2. Multiply the first equation by -2 and add the secondequation.

Elimination method:

In the elimination method, we can either add or subtract the equations to get an equation in one variable. At the time When the coefficients of one variable are opposites, so we can add the equations to eliminate a variable and when the coefficients of one variable are equal we can subtract the equations to eliminate a variable.

Learn more about an equation here: brainly.com/question/17599700

Answer 2

Answer:

Answer:

Step-by-step explanation:

if we multiply the first equation by neg 2, the 4x's cancel out.

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You and your friends Jose and Sarah all live on the same street. You know that Jose lives five blocks from away from you. Jose says that Sarah lives two blocks from him, but he didn't say whether she lives closer to you than he does or further. Let b be the number of blocks Sarah might live from you

Answers

Answer:

Kindly check explanation

Step-by-step explanation:

Given that:

Sarah, Jose and you live in the same street:

Distance between you and Jose = 5 blocks

Distance between Jose and Sarah = 2 blocks

Distance (b) between you and Sarah:

Since it isn't stated whether Sarah lives closer to you than Jose or vice versa ;

Then;

Distance b between you and Sarah will be :

(Distance between you and Jose ± distance between Jose and Sarah)

b = (5 ± 2)

b = (5 + 2) or (5 - 2)

b = 7 blocks or 3 blocks

Final answer:

In this question, we discuss the possible distances Sarah could live from you based on the information given.

Explanation:

José lives 5 blocks away from you, and he says that Sarah lives 2 blocks away from him. However, he did not specify whether Sarah lives closer to you or further away. Let's assume Sarah lives closer to you than José to explore the possible distance.

If José lives 5 blocks away from you, and Sarah lives closer to you than José, then Sarah must live either 1, 2, 3, or 4 blocks away from you. So, b can be any of those values.

Learn more about Distances here:

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Solve for x pls help me

Answers

Answer:

Step-by-step explanation:

circumference of total circle = 16 pi

16 pi / 4 pi = 4

1 / 4 =25%

1/4 * 360 = 90

The mass of one liter of water is about one ____A : Milligram

B : Kilogram

C : Gram

Answers

gram

The density of water is about 1g/cm3

Simplify the expression. Write the answer using scientific notation.Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5,880,000,000,000 miles. Suppose a star is 15.8 light-years from Earth. In scientific notation, how many miles away is it?

Answers

we are given with two distances: 5,880,000,000,000 miles and 15.8 light-years. we convert first the light-years distance through the speed of light : 3 x 108 m/s. v = d/t; d = 3x10 8 m/s * 15.8 light years * 31536000 s = 1.4948 x1017 m = 9.28829 x 1013 miles. The difference thus is 8.70029 x 1013 miles

What is 5 1/2% tax on $20?

Answers

5.5 move decimal place over twice 20*.055 =$1.1 in sales tax

5 1/2 percent must be converted to decimal form first to calculate immediately the value of 5 1/2 percent of $20. 5 1/2 percent over 100 percent is equal to 0.055. The product therefore is equal to 0.055*$20 equal to $1.1. The final answer is $1.1. The unit $ remains the same

What is the value of x in the equation 4(2x + 10) = 0?

−5
−7
5
7