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Aliun [14]
3 years ago
8

Weegy solve the system of equations 2x+3y=40 and -2x+2y=20

Mathematics
1 answer:
prisoha [69]3 years ago
5 0

adding the 2 equations eliminates x and gives:-

5y = 60

y = 12

Plug y = 12 into the first equation:-

2x + 3(12) = 40

2x = 40 - 36 = 4 so x = 2

Answer is x = 2 and y = 12.

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If pr is 3x+14 and qr 7x-10 what is x
mr Goodwill [35]
Start the equation by putting the equations equal to each other 3x+14=7x-10
Next +10 on both sides
3x+14=7x-10
+10 +10
You are left with 3x+24=7x
because the 10's canceled each other out.
Next -3x on both sides
3x+24=7x
-3x +3x

You are left with 24= 10x
because like before the 3's canceled each other out
Now you will divide both sides by 10

24=10x
---- -----
10 10

2.4= X is the answer!
8 0
3 years ago
If h(x) = 4x – 3 and p(x) = x2 – 3x, find p(-3)<br><br> 18<br> 0<br> -3
navik [9.2K]

Answer: p(-3)=18

Step-by-step explanation:

To find p(-3), you plug -3 into p(x) and solve.

p(-3)=(-3)²-3(-3)               [exponent]

p(-3)=9-3(-3)                    [multiply]

p(-3)=9+9                         [add]

p(-3)=18

Now we found that p(-3)=18.

7 0
3 years ago
What is -0.009 to the second power
kondaur [170]
I believe it's -0.000081
5 0
3 years ago
Evaluate the expression when c=4.<br>c²+5​
Sauron [17]
21 I think cause you use pemdas
4 0
3 years ago
Read 2 more answers
Find the value of x for which the lines l and m are parallel. Choices are in the attachment.. (disregard the filled in answer)
umka21 [38]
<h3>Answer: Choice B) 13</h3>

You chose the correct answer.

======================================================

Explanation:

Lines M and L are only parallel if and only if the corresponding angles are congruent.

The angles 127 and (9x+10) degrees are corresponding angles. They are both on the same side of the transversal, and they are to the right of each parallel line.

Set the two angle expressions equal to one another. Solve for x

9x+10 = 127

9x = 127-10

9x = 117

x = 117/9

x = 13

6 0
3 years ago
Read 2 more answers
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