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sergey [27]
2 years ago
15

Solve each system by elimination. - 6r – 6y = -18 -5r + 8y = 24

Mathematics
1 answer:
CaHeK987 [17]2 years ago
8 0

Answer:

Step-by-step explanation:

30r + 30y = 90

-30r + 48y= 144

78y = 234

y = 3

-6r - 6(3) = -18

-6r - 18 = -18

-6r = 0

r = 0

(0, 3)

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Answer:

When X=Y every number on either side is the same, for example 1(X)=1(Y)

Step-by-step explanation:

This is because when X=Y the X value isn't altered in any way to equal Y, so they are the same number, hope this helped!

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3 years ago
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OleMash [197]

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216

Step-by-step explanation:

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3 years ago
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photoshop1234 [79]

Answer:

SA: 664 in²

LA: it’s supposed to be 1040cm???

Step-by-step explanation:

SA: find the area of all sides of the prism first (I suppose it’s rectangular?)

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8 0
3 years ago
there are 3/4 as many boys as girls in a class of fifth-graders if there are 35 students in the class how many a
Arlecino [84]
Alright so turn 3/4 into a decimal.
3/4 =.75

We need to set up an equation. To do that are need to give boys and girls their own variables.

Girls= X

And since there is 3/4 as many boys
Boys=. 75X

Now we know the sum of boys and girls equals 35
X+.75X=35

X+.75X=1.75X
Now we have 1.75X=35

Divide by 1.75 and get
20=X

Now plug 20 into the equations got from before.
Boys =. 75*X = 20 *. 75 = 15
Girls = X =20

Your Answer:
15 boys
20 girls

You can check
20+15=35
15/20=3/4

8 0
3 years ago
Read 2 more answers
Simplify the given expression. 10(0.4x+0.2y)+21(0.6x−0.8y)
Delvig [45]

Answer:

your answer would be

Step-by-step explanation:be (0.6x-0.8y)

3 0
3 years ago
Read 2 more answers
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