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Vesna [10]
3 years ago
10

LAST ONE! I NEED HELP ON THIS ONE. I NEED TO TURN THIS IN, IN THE NEXT 5 MINS!!! SHOW WORK!!!

Mathematics
1 answer:
lozanna [386]3 years ago
3 0

Answer:

x=3, x=-9

Step-by-step explanation:

X^2+6x=x(x+6)=27

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Red and grey bricks were used to build a decorative wall. The number of red bricks and grey bricks was 5/2. There were 140 brick
ozzi

Answer:

100 red bricks

Step-by-step explanation:

Let's say red bricks is equal to 5x

Gray bricks is equal to 2x

We have an equation

2x + 5x = 140

= 7x = 140

Divide through by 7 to get the value of x

X = 140/7

X = 20

Red bricks = 5(x)

= 5(20)

= 100

Gray bricks = 2(x)

= 2(20)

= 40

Therefore in conclusion the number of red bricks is 100.

5 0
2 years ago
Solve the following system of equations algebraically:<br> y = x^2+7x−4 <br> y = −x−4
oksian1 [2.3K]
Y = x² + 7x - 4
y = -x - 4

x² + 7x - 4 = -x - 4
      + x       + x
x² + 8x - 4 = -4
           + 4  + 4
     x² + 8x = 0
x(x) + x(8) = 0
    x(x + 8) = 0
x = 0  or  x + 8 = 0
                   - 8  - 8
                     x = -8

      y = -x - 4
      y = -0 - 4
      y = 0 - 4
      y = -4
(x, y) = (0, -4)
         or
       y = -x - 4
       y = -(-8) - 4
       y = 8 - 4
       y = 4
 (x, y) = (-8, 4)

The solutions are (0, -4) and (8, -4).
7 0
3 years ago
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Sarah bought a TV for $250. Three years later she sold it for $180. Work out her percentage loss.
Anna71 [15]
70/250 x 100
Answer: 28%
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3 years ago
Giving Brainliest!! 1.Zeus Industries bought a computer for $2857. It is expected to depreciate at a rate of 24% per year. What
iVinArrow [24]

2857*.24%=685.68

685.68*3=2057.04

2857-2057.04=799.96

8 0
3 years ago
The hardcover version of a book weighs twice as much as its paperback version. The hardcover book and the paperback together wei
HACTEHA [7]

Answer:

The 4th system (h = 4.2 − p ; h = 2p)

Step-by-step explanation:

3 0
3 years ago
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