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kozerog [31]
3 years ago
8

What is the sum of 5a2 - 4a + 3 and -7a2 +4a -6

Mathematics
2 answers:
Pavel [41]3 years ago
5 0
4a-3 it’s the correct answer
zimovet [89]3 years ago
4 0
-4a-3 i think that’s it
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Cloud [144]

Answer:

A

Step-by-step explanation:

If all of the dimensions of the tank are doubled, since we live in three dimensions, the volume of the new tank will be 2^3=8 times as large. 8\cdot 2000=16000 feet, or answer choice A. Hope this helps!

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3 years ago
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the correct answer is D

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Find the 9th term of the geometric sequence 2, -10 50 -250
tigry1 [53]

Answer:

781250

Step-by-step explanation:

We first need to find the common ratio

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The common ratio is -5

an = a (r) ^ (n-1)

a9 = 2 ( -5) ^(9-1)

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7 0
3 years ago
Worldwide, the proportion of babies who are boys is about 0.51 . Let the random variable X represent the number of boys in five
solmaris [256]

Answer:

mean = 2.55

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Step-by-step explanation:

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= 1-0.51

= 0.49

We have n = 5

We calculate the mean as:

np

= 0.51x5

= 2.55

Therefore mean = 2.55

The standard deviation

= √variance

= √npq

= √0.51x5x0.49

=√1.2495

= 1.118

6 0
3 years ago
Find three right triangles based upon the Pythagorean Triple of 8, 15, and 17. Explain how you know these are triangles.
Luba_88 [7]
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64 + 225 = 289
289=289
It is a triangle because the numbers match the Pythagorean Theorem. 
7 0
4 years ago
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