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tino4ka555 [31]
3 years ago
7

Which of the equations are true identities?

Mathematics
1 answer:
Wittaler [7]3 years ago
5 0

Answer:

A

Step-by-step explanation:

I assume that you mean -4 instead of +4 in the first one

(5b-2)^2-4=25b^2-20b+4-4=25b^2-20b

then A is the correct answer

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2. write the ratio in fraction as simplest form . 24 g to 56 g​
HACTEHA [7]

Answer:

\frac{3}{7}

Step-by-step explanation:

To simplify the fraction find the GCF (greatest common factor). The GCF is the largest number that is a factor of both the numerator and denominator. Both 24 and 56 have a factor of 8, this is the GCF. Divide both numbers by 8 to get the final answer of 3/7.

7 0
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Please explain how to solve y=2x+4 and y=x-3 (EXPLAIN please, not doing the work)
tresset_1 [31]
Both equations are equal to y, so set them equal to each other forming an equation in x

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8 0
3 years ago
A triangle has angle measures 23° and 35°. What is the measure of the third angle ?
frozen [14]
23 + 35 + A=180
58 + a =180
-58         -58
-------------------
      A   = 122 degrees
7 0
3 years ago
Read 2 more answers
I need to know what the exact and estimated sum is
solniwko [45]

Answer:

Exact: 55.899

Estimate: 56

Step-by-step explanation:

8.176 + 5.802 + 41.921 = 55.899

8.176 ~ 8

5.802 ~ 6

41.921 ~ 42

8 + 6 + 42 = 56

8 0
3 years ago
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