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zloy xaker [14]
2 years ago
11

(3a ^2 + 1) - ( 4+2a^2)

Mathematics
1 answer:
xz_007 [3.2K]2 years ago
8 0

Answer:

a^2 - 3

Step-by-step explanation:

(3a^2 + 1) - (4 + 2a^2)

3a^2 + 1 - 4 - 2a^2

a^2 - 3

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Which of the following is the mid segment of ABC
madam [21]

Answer:

LM

Step-by-step explanation:

A midsegment is the line from the midpoint of 2 sides of the triangle and parallel to the third side.

L is at the midpoint of AB and M is at the midpoint of BC

LM is the midsegment


3 0
3 years ago
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The numbers of chocolate
Mrrafil [7]

mean = sum/n

mean = (5 + 7 + 7 + 9 + 12 + 16 + 21)/7

mean = 77/7

mean = 11

8 0
3 years ago
Graph y=8.5xy=8.5xy, equals, 8, point, 5, x.
Morgarella [4.7K]

Answer:

  • A, B, E

Step-by-step explanation:

<u>Given equation</u>

  • y = 8.5x

<u>Answer choices</u>

A. The equation represents a proportional relationship.

  • TRUE, it is in the form of y = kx

B. The unit rate of change of y with respect to x is 8.5

  • TRUE, y = mx + b, the slope m = 8.5 is the rate of change

C. The slope of the line is 2/17

  • False, the slope is 8.5

D. A change of 17 units in x results in a change of 2 units in y.

  • False, a change of x = 17 results in 17*8.5 = 144.5 units in y

E. A change of 4 units in x results in a change of 34 units in y.

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3 0
2 years ago
Are the ratios 25/45 and 15/27 proportional? Explain.
liberstina [14]
Write them out as a fraction then reduce them. If theyre the same then its proportional.

25/45 can be cancelled down to 5/9

15/27 can be cancelled down to 3/9

So no theyre not.
6 0
2 years ago
David has two jobs. He earns $8 per hour babysitting his neighbor’s children and he earns $11 per hour working at the coffee sho
denpristay [2]

Answer:

The answer is 5 hours.

Step-by-step explanation:

First you have to figure out how much money he already had by working at the coffee shop, so take the 15 hours and multiply it by 11$ he makes per hour and you get 165$, now you have to subtract the 200$ by 165$ to figure out how much he needs so 200 - 165 = 35 that is needed, then you keep going up an hour until your total comes above 35 so if he does 1 hour its 8, 2 hours is 16, 3 hours is 24, 4 hours is 32, and 5 hours is 40 which is finally enough to reach his goal.

5 0
3 years ago
Read 2 more answers
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