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iragen [17]
3 years ago
12

Use substitution to solve the following system of equations. 9x + 5y = 32 AND y = -3x + 4

Mathematics
1 answer:
Darya [45]3 years ago
4 0

Answer:

x = -2

y = 10

Step-by-step explanation:

Since they already gave y as -3x +4, you will then have to substitute that amount into the formula

9x + 5y = 32

By doing that you get

9x +5(-3x+4) = 32

9x -15x +20 = 32

Then, you ill take 20 to the other side to subtract 32, which will get you

-6x = 12

Then, you will get x = -2

Then substitute that for the equation

y = -3x + 4

You will get

y = -3(-2) + 4,

You will get y as 10

SO then your final answer is x = -2, y = 10

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6 0
3 years ago
The time (t) it takes to clean an office building is directly related to the number of people (p) working.
cricket20 [7]

Answer:

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4 0
4 years ago
Read 2 more answers
-2(2u-3)+3u=3(u+8)<br> u=?
dsp73
If you expand this equation first
You get -4u+6+3u=3u+24

And if you simplify that you get:
-u+6=3u+24
Now you need to solve this equation to find u

First bring 3u to the other side to -u-3u (the positive changes to negative)
Now the equation is
-4u+6= 24
Take 6 of both sides
-4u=24-6= 18
-4u= 18
So u= -18/4
Which simplifies to -9/2

Answer: -9/2
7 0
3 years ago
The admission to a local fair is $10 for each adult and $6 for each child. Each ride costs $1.50 for an adult and $1 for a child
S_A_V [24]
So first start out by writing an expression for the cost of the child and the adult separately.

Child:
6 + 1r   ($6 + $1 per ride)

Adult:
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to find how much more the adult will spend, just do Adult Expression - Child Expression which will be:

10 + 1.5r - (6 + 1r)  just simplify this

For Part B, use your equation from part A where r = 7
6 0
3 years ago
there are 500 hundred pages. if the book has 25 chapters and each chapter is 20 pages long. what is the chance that of randomly
nataly862011 [7]
20/500
0.04 of a chance
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