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mart [117]
3 years ago
5

Simplify: 42x^7-(-11x^7)

Mathematics
2 answers:
vodka [1.7K]3 years ago
8 0

Answer: 53x^7

Step-by-step explanation:

Subtracting a negative is like adding.

bija089 [108]3 years ago
7 0
53x^7 is the answer.
Since two negatives equal a positive 42 +11 = 53, so just add the exponent back which would be 53x^7.
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Caroline's baby sister sleeps of the day.<br> How many hours does she sleep?
Natali [406]

Answer:

If she sleeps all day it’s 24 hours but if she’s normal she sleeps 8-12 hours.

Step-by-step explanation:

Hope this helps.

7 0
3 years ago
If A is the area of a square measured in square inches and s is the square's side length measured in inches, then the square's s
motikmotik

Answer:

a)

g(3.5), g(26.92)

or

g(3.5)=3.5^2, g(26.92)=26.92^2

5 0
3 years ago
The number of candies consumed varies inversely with the number of children present. When 12 children are present,140 pieces of
irinina [24]
Loosely, "varies inversely" means that as one quantity increases, the other decreases. Specifically, if x and y vary inversely, then y = k/x where k is some constant (a particular number).

Another way to write that relationship is xy = k.  To find the value of k for this problem, you need a numbers for x and y that go together.

Suppose x = number of children and y = number of candies (it doesn't matter what order these go in as long as you keep track!).

"When 12 children are present, 140 pieces of candy are consumed."  So when x = 12, the value of y = 140.

xy = k
(12)(140) = k
1680 = k

Now, when x = 8 children,

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5 0
3 years ago
Read 2 more answers
Find the volume of a cylinder with a diameter of 8 inches and a height that is three times the radius.
Eddi Din [679]

Step-by-step explanation:

volume = pi x radius² x height

okay so the cylinders diameter is 8 inches

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6 0
3 years ago
Find the cosine of angle B.
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\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }

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9² = 12² + 15² - 2 (12) (15) cos (B)

81 = 144 + 225 - 360 cos(B)

81 = 369 - 360 cos (B)

360 cos (B) = 369 - 81

360 cos (B) = 288

cos (B) = 0.8

-

Answer: Cosine B = 0.8

-

\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }

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12² = 15² + 9² - 2 (15)(9) cos (A)

144 = 225 + 81 - 270 Cos A

144 = 306 - 270 Cos A

270 Cos A = 162

Cos A = 3/5 or 0.6

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Answer: Cosine Angle A = 3/5

4 0
3 years ago
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