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3 years ago

12

Use the elimination to solve this equation. 2x+3y=55 9x+4y=105

1 answer:

seropon [69]3 years ago

6 0

X=5 y=15 (5,15).
This is how you do it:
-4(2x+3y=55): -8x-12y=-220
3(9x+4y=105):27x+12y=315

You add the two new equations together, canceling out the y values, and get the x value. Then, you go back and plug in the x value in the original equation to get the y value.

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1. -30 and 25<br> 2. -34 and -37<br> 3. -15 and 15

inessss [21]

What’s the question ???

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3 years ago

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Can anyone help me out? I’ll give Brainly! Thank you :)

Oliga [24]

Answer:

The rate of return is 14%

Step-by-step explanation:

The rate of return can be determined by,

RR = $\frac{A_{f} - A_{i} }{A_{i} }$ x 100%

where:

RR is the rate of return

$A_f}$ is the final amount = $690 - $6 = $684

$A_{i}$ is the initial amount = $15 x 40 = $ 600

So that,

RR = $\frac{684 - 600}{600}$ x 100%

= 0.14 x 100%

= 14%

Therefore, the rate of return is 14%.

7 0

3 years ago

Amber has 2 red crayons,5 blue crayons,and 4 yellow crayons.how many crayons does she have

Gelneren [198K]

All you have to do is addition. 2+5+4=11. Or you can break it down and go 2+5=7 and then 7+4=11. Or 5+4=9 then 9+2=11. Or 4+2=6 then 6+5=11.

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3 years ago

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What is the solution of the system of equations?<br><br> Y=-3x+8<br> Y=-5x+2

olganol [36]

Answer:

x=-3 y=17 (-3;17)

Step-by-step explanation:

-3x+8-y=0

-5x+2-y=0

-2x-6=0

So: x=-3

While....by substituting: y=17

3 0

3 years ago

A triangle has an area of 38.4 cm2. The

lisov135 [29]

Answer:

6cm

Step-by-step explanation:

$A = \frac{h_b b}{2}$

$38.4 = \frac{12.8_b b}{2}$

$b = 2\frac{A}{h_b}$

$b = 2\frac{38.4}{12.8}$ = 6

8 0

3 years ago