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torisob [31]
4 years ago
6

Solve by elimination: -9x-4y=-20 5x+4y=4

Mathematics
1 answer:
Andrej [43]4 years ago
6 0
Eliminate the y by making them zero.

-9x=-20
5x=4

Combine

-4x=-16

Divide each side by 4 to put the x alone

-4x/4= -16/-4

X=4

Plug x=4 back into one of the equations. It does not matter

5(4)+4y=4

20+4y=4
-20 -20

4y=-16
Divide by 4

Y=-4
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Answer:

CBX and FBC

Step-by-step explanation:

adjacent angles are right next to each other

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maksim [4K]
1a) 2 lanterns-10 light bulbs
5 lanterns- _ light bulbs

b) The missing term is 25 

c) The scale factors are 2:10 and 5:25, 2 to 10 and 5 to 25, 2/10 and 5/25

Work Shown....

2/10=5/x cross multiply

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Hope I helped ya...
Like


6 0
4 years ago
Answer this please . <br><br><br>​
Monica [59]

Answer:

\frac{3}{5}x+2=\frac{2}{3}x\\\\\frac{3}{5}x+2-2=\frac{2}{3}x-2\\\\\frac{3}{5}x=\frac{2}{3}x-2\\\\\frac{3}{5}x-\frac{2}{3}x=\frac{2}{3}x-2-\frac{2}{3}x\\\\-\frac{1}{15}x=-2\\\\\left(-\frac{1}{15}x\right)\left(-15\right)=\left(-2\right)\left(-15\right)\\\\x=30

hope this helps you

4 0
3 years ago
Read 2 more answers
Stephanie bought 3 pizzas for a total of $9.00. Which expression shows p, the cost of each pizza?
SSSSS [86.1K]

Answer:

the answer is 3

Step-by-step explanation:

3 pizzas equal $9.00 so in order to know how much each pizza was, we will have to do division:

9 divided by 3

9/3

3

4 0
4 years ago
Tom has read the first 40 pages of a book. He plans to read another 12 pages each day Write an equation that represents the rela
fenix001 [56]

Answer:

p=12d+40

Step-by-step explanation:

-This is a linear relationship problem modeled as:

y=mx+c

where:

  • y is the quantity at variable x
  • m is the slope
  • c is the constant of increment or decrement.
  • x is the variation variable.

Given the constant 40, and 12 pages per day as the rate of change we substitute our variables in the form of the formula above as:

p=12d+40

4 0
4 years ago
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