All categories

2 years ago

X=2y-47x+5y=-66 what is the x- value

Mathematics

1 answer:

Gwar [14]2 years ago

5 0

Answer:

x = -8

Step-by-step explanation:

x = 2y - 4 --- Equation 1

7x + 5y = -66 --- Equation 2

I will be using the substitution method to solve this.

Substitute x = 2y - 4 into Equation 2:

7x + 5y = -66

7(2y - 4) + 5y = -66

Evaluate.

14y - 28 + 5y = -66

Evaluate like terms.

19y - 28 = -66

Isolate 19y.

19y = -66 + 28

= -38

Find y.

y = -38 ÷ 19

y = -2 --- Equation 3

Substitute y = -2 into Equation 1:

x = 2y - 4

x = 2(-2) - 4

Evaluate.

x = -4 - 4

x = -8

You might be interested in

Which set of ordered pairs is NOT a function? {(0,0), (1,1), (2,2), (3,3)} {(1,2), (3,4), (4,5), (5,6)} {(4,1), (5,1), (6,1), (7

vovikov84 [41]

Do you not have a graph to go with it?

4 0

2 years ago

Complete the equation so that it has solutions of –5 and 7. + = 0

nekit [7.7K]

Answer:

the answer is - 2

Step-by-step explanation:

7-5=2-2=0

8 0

2 years ago

Please help me with the whole problem.

lions [1.4K]

Answer:

1. $155 ≥ $31.50p + $13.25

2. p ≤ 4

6 0

2 years ago

Solve for x and round yout answer to the nearest tenth.

Evgesh-ka [11]

Answer:

x=21.35764429=21.4

Step-by-step explanation:

Take SOHCAHTOA

in this problem you're going to use SOH, which is sine= opposite/hypotenuse

sin31=11/x

Multiply by x as a way to isolate it

x(sin31)=11

divide my sin31 to isolate x

x=11/sin31

x=21.35764429

5 0

3 years ago

Write an expression involving integers for each statement a) moving 4 steps left, then moving 9 steps right b) on 3 separate occ

Nostrana [21]

Answer:

(a) $-4+9$

(b) $-2 \times 3$

Step-by-step explanation:

Part A

Moving 4 steps left, then moving 9 steps right

When you move left, we indicate with a negative sign while a move right is indicated with a positive sign.

Moving 4 steps left = -4

Moving 9 steps right = +9

Therefore, an expression for the statement is: $-4+9$

Part B

When you lose or owe in word problems, it is usually indicated using a negative sign.

Therefore, the statement Shari lost 2 pencils can be represented with the integer: -2

Since Shari lost 2 pencils on 3 occasions, we simply have:

$-2 \times 3$

3 0

2 years ago

X=2y-47x+5y=-66 what is the x- value​

X=2y-47x+5y=-66 what is the x- value