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mojhsa [17]
2 years ago
9

( -8.7 ) • ( -10 ) = ?

Mathematics
1 answer:
Ber [7]2 years ago
6 0

Answer:

87

Step-by-step explanation:

A negative times a negative always equals a positive, and 10 times anything is just moving the decimal point to the right once, so 8.7 becomes 87.0

You might be interested in
The sum of two odd integers is an even integer.<br> 1. True<br> 2. False
ICE Princess25 [194]

Answer:

True.

Step-by-step explanation:

Try out some numbers:

3 + 3 = 6

5 + 5 = 10

11 + 11 = 22

7 0
3 years ago
At a farm, there are two huge pits for storing hay. 90 tons of hay is stored in the first pit, 75 tons in the second pit. Then,
Travka [436]

Answer:

63 tons

Step-by-step explanation:

The problem statement asks for the tons of hay removed from the first pit. It is convenient to let a variable (x) represent that amount. This is said to be 3 times the amount removed from the second pit, so that amount must be x/3.

The amount remaining in the first pit is 90-x.

The amount remaining in the second pit is 75 -x/3.

Since the first pit remaining amount is half the second pit remaining amount, we can write the equation ...

... 90 -x = (1/2)(75 -x/3)

... 180 -2x = 75 -x/3 . . . . multiply by 2

... 105 - 2x = -x/3 . . . . . . subtract 75

... 315 -6x = -x . . . . . . . . multiply by 3

... 315 = 5x . . . . . . . . . . . add 6x

... 63 = x . . . . . . . . . . . . . divide by 5

63 tons of hay were taken from the first pit.

_____

<em>Check</em>

After removing 63 tons from the first pit, there are 27 tons remaining. After removing 63/3 = 21 tons from the second pit, there are 54 tons remaining. 27 is half of 54, so the answer checks OK.

6 0
3 years ago
I need help please ​
galina1969 [7]

Answer:

it looks like you add the 2 than the 7

Step-by-step explanation:

yea thats it

3 0
2 years ago
X=-3<br> A. 64<br> B. 8<br> C. 4<br> D. 16
stepan [7]

Answer:

The answer is A.

Step-by-step explanation:

I took the test

8 0
2 years ago
MARKIN BRAINIEST!!! 48PTS!!! Select ALL the correct answers. Which expressions are equivalent to the following? 30x^2-5x-10
12345 [234]

Answer:

B, C, and E.

Step-by-step explanation:

<em>Common term of 5.</em>

<em>5(6x²-x-2)</em>

<em>Factor.</em>

<em>6x²-x-2</em>

<em>(6x²+3x)+(-4x-2)</em>

<em>=3x(2x+1)-2(2x+1)</em>

<em>(2x+1)(3x-2)</em>

5(2x+1)(3x-2)

<em>B, C and E is the correct answer.</em>

<em>I hope this helps you, and have a wonderful day!</em>

8 0
3 years ago
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