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3 years ago

Someone help me with this question please.

Mathematics

1 answer:

grandymaker [24]3 years ago

5 0

It’s 27 because u multiple the first 2 number and it’s a negative then add the rest to it

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Solve the system of linear equations by graphing. y = –5/2 x – 7 x + 2y = 4 What is the solution to the system of linear equatio

Anestetic [448]

Keywords

system; linear equations; graphing; solution

we have

$y=-\frac{5}{2}x-7$ -------> equation A

$x+2y=4$

$x=4-2y$ ----> equation B

The system of linear equations is composed of equation A and equation B

Substitute the equation B in equation A

$y=-\frac{5}{2}[4-2y]-7$

$y=-10+5y-7$

$4y=17$

$y=17/4=4.25$

Find the value of x

$x=4-2[17/4]=-4.5$

The solution is the point $(-4.5,4.25)$

Using a graphing tool

see the attached figure

therefore

the answer is the option A

$(-4.5,4.25)$

4 0

3 years ago

Read 2 more answers

29.046 rounded to nearest whole number

muminat

The answer is 29.00 hope this helps

8 0

3 years ago

What is 3/4 divided by 2/3

Sindrei [870]

Answer:

9/8 or 1.125

Step-by-step explanation:

8 0

3 years ago

Kim and Sam were each given the same pair of numbers. Sam's description of the two numbers was: The larger number is 3 more than

irina1246 [14]

Answer:

Sam's description = $3x+3$ , Kim's description = $5x-7$

Step-by-step explanation:

Given:

Kim and Sam were each given the same pair of numbers.

Sam's description of the two numbers was:

The larger number is 3 more than three times the smaller number.

Kim's description of the two numbers was:

Five times the smaller number decreased by 7 is the larger number.

Question asked:

Which equation represents the situation?

Solution:

Let smaller number = $x$

According to Sam's description of the two numbers, the equation will be:-

Larger number = 3 more than three times the smaller number

= $3x+3\ (eq1)$

According to Kim's description of the two numbers was, the equation will be:-

Larger number = Five times decreased by 7

= $5x-7\ (eq2)$

By equating both equation:-

$5x-7=3x+3\\ \\ Subtracting\ both\ sides\ by \ 3x\\ \\ 5x-3x-7=3x-3x+3\\ \\ 2x-7=3\\ \\ Adding\ both\ sides\ by\ 7\\ \\ 2x-7+7=3+7\\ \\ 2x=10\\ \\ Dividing\ both\ sides\ by\ 2\\ \\ x=5$

Smaller number = $x$ = 5

Larger number = $3\times5+3=15+3=18$

Therefore, equations represents the situation are $3x+3$ and $5x-7$

8 0

3 years ago

A. 5 inches B. 6 inches C. 10 inches D. 20 inches

Verdich [7]

Answer:

The answer is C. 10 inches

7 0

3 years ago

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