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Agata [3.3K]
2 years ago
14

8th grade math help!!

Mathematics
1 answer:
horsena [70]2 years ago
5 0

Step-by-step explanation:

A = 1/2h(b1 + b2)

2A = h(b1 + b2)

h(b1 + b2) = 2A

h = 2A/(b1 + b2)

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Choose the correct simplification of the expression (−2x + 4y)(3x − 7y).
Rudik [331]
-2x • 3x = -6x2 (the 2 is an exponent)
4y • -7y = -28y2 (the 2 is an exponent)
-2x • -7y = 14xy
4y • 3x = 12xy
14xy + 12xy = 26xy

—> -6x2(expo) - 28y2(expo) + 26xy

Check the answer again just to be sure, it’s been a while since I’ve had algebra!
3 0
3 years ago
Carlos says that 17.43÷100 is the same as 174.3÷0.01 is he correct? Explain.
klio [65]
No, in order for this to be correct, you'd have to move BOTH decimals in the same direction the same amount of places.<span />
6 0
2 years ago
Read 2 more answers
|
alekssr [168]

Answer: the answer is infinite solutions

Step-by-step explanation:Systems of Equations Level 1:

Question 1

Two linear equations are given below.

Exactly how many solutions does this system of equations have?

Select one:

4 0
2 years ago
Please help explanation if possible
egoroff_w [7]

Answer: x = 2 and y = -4

x + 2y = -6

x = -6-2y

Putting this in value of x in

6x + 2y = 4

6(-6-2y) + 2y = 4

-36-12y+2y = 4

-10y = 4+36

y = 40/(-10)

y = -4

Now putting this value of y in

x + 2y = -6

x + 2(-4) = -6

x -8 = -6

x = -6+8

x = 2

Therefore x = 2 and y = -4

If we put these values we can check this

x + 2y = -6

2 + 2(-4) = -6

2 -8 = -6

-6 = -6

please click thanks and mark brainliest if you like :)

7 0
2 years ago
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Can I get some help ​
dexar [7]

Answer:

c.13.7mi, A=33.3°, B=56.7°

6 0
3 years ago
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