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love history [14]
3 years ago
9

Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest

Mathematics
1 answer:
Advocard [28]3 years ago
7 0

Answer:

-21

28

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

 4 * x = 16 * 7

 x = 4 * 7

 x = 28

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What is 23 squared? A. 1,058 B. 529 C. 129 D. 46
Sladkaya [172]
Squared is times itself.
23x23 = 529
Hope that helps!
Heather
5 0
3 years ago
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this is about similar triangles :)which of the following statements is true about similar triangles?the measurements of correspo
GenaCL600 [577]

Similar triangles:

Similar triangles have two important properties:

1. The corresponding sides of the triangles are proportional.

2. The corresponding angles of the triangles are congruent.

Let us analyze each of the given options.

1. The measurements of corresponding angles differ between the two triangles.

False, since the corresponding angles must be congruent.

2. Two triangles are similar if their corresponding sides are proportional.

True, since the corresponding sides are proportional in similar triangles.

3. If two triangles are similar, both their corresponding sides and angles are always congruent.

False, since only the angles need to be always congruent not the sides.

4. Similar triangles differ in shape but are the same in size.

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6 0
1 year ago
If you pay $0.82 for every $1,000 of earthquake coverage, how much would $15,000 of coverage be?
Ann [662]
820
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3 0
3 years ago
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What is 2+2÷4+34-2÷20= ____
Vadim26 [7]
Follow pemdas
2+(1/2) +34- (1/10)
2.5 + 34 - .1
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36.4
3 0
3 years ago
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Please help me, this is due in 2 hours and I need this done plz.
bija089 [108]

Answer:

It's probably it

Step-by-step explanation:

A = (-4, -2)

B = (1, 6)

Imagine a new point (C) where they intersect (1, -2)

Now we can form a triangle, the distance between A and B will be the hypotenuse.

h² = 5² + 8²

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h² = 89

h = \sqrt{89}

h = ~9.43...

h = 9

5 0
2 years ago
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