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WITCHER [35]
3 years ago
10

a. If Mei has already earned 30 points, write and solve an addition equation to find the number of points she still needs.​

Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Answer:

x-30

Step-by-step explanation:

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What is the equation of the points (-3,2) (2,-1) in standard form? 
Evgen [1.6K]
You can just plug in one of the points to each equation until you get an equality that is true.

I chose to use (-3,2)

1. 5x+3y=1
5(-3)+3(2)=1
(-15)+ 6 = 1
(-9) = 1 <<<(FALSE)

2. x+5y=3
(-3)+5(2)= 3
(-3)+10= 3
7=3 <<<(FALSE)

3. 3x+5y=1
3(-3) + 5(2)= 1
(-9)+10=1
1=1<<<(TRUE)

So, the correct equation is 3x+5y=1.

Make sense?
3 0
3 years ago
-3+x=4 solve this question
user100 [1]
Just add 3 to both sides
x = 7
4 0
3 years ago
Read 2 more answers
-3(8n+10) <br> distributive property
Lerok [7]
-24n - 30, i suggest using math.way before asking a math question aha
6 0
2 years ago
Read 2 more answers
0.3(5x - 1.5) = 7.5 x= ?
vfiekz [6]

Answer:

x=5.3

Step-by-step explanation:

.3(5x-1.5)=7.5

1.5x-.45=7.5

1.5x=7.95

x=5.3

6 0
3 years ago
Type an equation that can be used to solve for the missing angles. DO NOT SOLVE.
muminat

Answer:

x°+2x°+(x-24)°=180°

Step-by-step explanation:

The sum of of the interior angles of all triangles add up to 180°

Adding x°, 2x°, and (x-24)° <em>will</em> equal 180

Therefore, an equation that can be used to solve for the missing angles is: x°+2x°+(x-24)°=180°

6 0
3 years ago
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