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ivann1987 [24]
3 years ago
13

Please help me with this question ​

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Answer:

c 7

Step-by-step explanation:

5a^3 + 9a^2 +7a+4

The coefficient of a is the number in front of a

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If y is directly proportional to x and y = 17.5 when x=21 find y when x=39
morpeh [17]

direct proportion y=kx , k is constant and k does not equal to 0.

17.5=k(21)

k=5/6

when x =39

y=5/6 ×39

y=32.5

4 0
3 years ago
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Simplify.<br><br> 4a(6) + 3a<br><br> 24 a2 + 3 a<br> 13 a<br> 27 a<br> 27 a2
noname [10]

Answer:

24a + 3a

27a

we didn't multiply a since it is addition so it can not be a²

please give brainiest

8 0
3 years ago
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Find the volume of the pyramid.
zlopas [31]

Answer:

7

Step-by-step explanation:

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A= ( 3 x 1 ) x 7 / 3

A= 3 x 7 / 3

A= 21 / 3

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8 0
3 years ago
Last Saturday, Camila practiced her dance routines for her upcoming competition. She spent some time practicing her tap routine,
Natalka [10]

Answer:

t = 28 minutes

Step-by-step explanation:

Last Saturday, Camila practiced her dance routines for her upcoming competition. She spent some time practicing her tap routine, and then she spent 17 minutes practicing her hip-hop routine. In all, she practiced for 45 minutes. Let t be the number of minutes that Camila practiced her tap routine. Write and solve an equation to find t.

45 minutes = Number of minutes for hip-hop routine + Number of minutes for tap dance

The equation is given as

45 = 17 + t

Solving for t

t = 45 - 17

t = 28 minutes

Shes spent 28 minutes tap dancing

4 0
3 years ago
What is the best measure of center? <br> a. range<br> b.median<br> c.mean<br> d.mode
kvasek [131]

Answer:

median is the best measure

Step-by-step explanation:

center = center position

-> median is the best measure

7 0
3 years ago
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