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Crank
3 years ago
11

Complete the solution of the equation. Find the value of y when x equals -1. -2x+7y=-54

Mathematics
1 answer:
svetoff [14.1K]3 years ago
4 0

Answer:


Step-by-step explanation:

-2(-1) + 7y = -54

2 + 7y = -54

-2            -2

7y = -56

Divide by 7

y = -8

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Mr. Berger assigned the following system of equations to be solved for homework. 2x-3y = -12
jeka57 [31]
-4x + 6y = 24
4x + y = -10

7y = 14

y = 2

2x - 6 = -12

2x = -6

x= -3

6 0
4 years ago
A car dealership sells SUVs and passenger cars . For a recent year, 80 more SUVs were sold than passenger cars. If a total of 51
MAVERICK [17]

Answer:

295 SUVs were sold, and 215 passenger vehicles.

Step-by-step explanation:

Let s and p represent the number of SUVs and p the number of passenger cars.  

Then s = p + 80 and s + p = 510.

Substitute p + 80 for s in the second equation, obtaining:

p + 80 + p = 510, or:

2p = 430

Dividing both sides by 2 isolates p:  p = 215.

Since s = p + 80, we add 80 to 215 here, obtaining s = 295.

295 SUVs were sold, and 215 passenger vehicles.

3 0
4 years ago
The perimeter of a triangle is 28 feet. One side of the triangle is 5 feet longer than the second side. The third side is 8 feet
Hitman42 [59]

side one is 5 side two is 10 and the third side is 13. 28 is not divisible by three so if one side i 5 ft longer and another side is 8 ft longer then you add them 5+8=13 then subtract 13 from the perimeter 28-13=15 then divide 15 by 3 and get 5 5 5. add 5 (5+5) (5+8).

7 0
3 years ago
Marissa is painting her rectangular patio, with the exception of a bench that does not need to be painted:
maxonik [38]

Answer:

Answer: A = (x + 20)(x + 10) − 12 is the correct answer

Step-by-step explanation:

We would take the length and width of the patio and subtract it by the area that does not need to be painted.

I got this right on the test!

Read more on Brainly.com - brainly.com/question/15992704#readmore

Step-by-step explanation:

3 0
3 years ago
The function f(x) = −x^2 − 5x + 50 shows the relationship between the vertical distance of a diver from a pool's surface f(x), i
elena-14-01-66 [18.8K]
We will solve the equation to find a zero of f(x):-x^{2}-5x+50=0
The formula is:x_{12} = \frac{-b\pm \sqrt{b^{2}-4ac } }{2a}where:
a=-1, b=-5, c =50 x_{12} = \frac{5\pm \sqrt{25+200} }{-2}= \frac{5\pm \sqrt{225} }{-2}= \frac{-10}{-2}=5This is the only solution because the other is:\frac{5+10}{-2}= \frac{15}{-2}=-7.5which is not possible.
Answer: D) The diver hits the water 5 feet away horizontally from the board.
5 0
4 years ago
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