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Maru [420]
2 years ago
15

This is a substitution problem

Mathematics
2 answers:
mrs_skeptik [129]2 years ago
6 0

They consists of equations and unknown variables. There are 4 PCs and 8 Mac in the room

<h3>System of equation</h3>

They consists of equations and unknown variables

Let the number of PCs be x

Let the number of Mac be y

If Mke has 12 computers, then;

x + y = 12

If there are two Macs for every PC in his classroom, then;

y = 2x

Substitute

x + 2x = 12

3x = 12

x = 4

Recall y = 2x

y = 2(4)

y = 8

There are 4 PCs and 8 Mac in the room

Learn more on system of equations here; brainly.com/question/14323743

#SPJ2

Ivanshal [37]2 years ago
6 0

Answer:4 PCs and 8 Macs

Step-by-step explanation:

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Mashutka [201]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
One day, he bought 10 pairs of socks for $2.50 each and 3 pairs of shoes for dollars each. He
IrinaVladis [17]

Answer:

2.50(10) + 3x = 135.97, x = 38.66

Step-by-step explanation:

This should be pretty simple.

Basically, we know that he bought 10 pairs for 2.50 so that's $25 right there.

Our total is 135.97 though-

so here, we take our total from the right side of the equation, and subtract 25 from that.

135.97 - 25 = 115.97

Since he bought three pairs, divide it by 3.

115.97 / 3 = 38.66

One pair of shoes costs $38.66 - hope this helps!

5 0
3 years ago
Which equation is equivalent to the given equation?
adelina 88 [10]

Answer:

B

Step-by-step explanation:

7m+11= -4 x 2m + (-4 x 3)

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6 0
3 years ago
While playing basketball this weekend Frank shoots an airball. The height H in feet of the ball is given by H equals -16t^2 + 32
Korvikt [17]

Answer:

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prey? who's attacking?

You just want to find t when H=0. So, solve

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6 0
3 years ago
What is the initial value of y= 8x+7
allochka39001 [22]

Answer:

7

Step-by-step explanation:

The initial value is another name for the y-intercept. This equation is written in point slope form (y=mx+b). And before you think y-intercept means y, right? No that is incorrect, I got that wrong in the beginning too ;)

y=mx+b

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b in the point slope form equation is always the initial value or y-intercept or whatever people call it. So what substitutes b out here? 7. So 7 is the initial value!

:) Hope you understand now! Have a good day!

8 0
3 years ago
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