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spin [16.1K]
3 years ago
5

Simplify (−6.5)(−4)(−2.8)

Mathematics
1 answer:
Flura [38]3 years ago
8 0
Since there are three negative numbers your product will be negative.
6.5 * 4 = 26.0
26. * 2.8 =
208
52
------------------
72.8
Answer is -72.8
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raketka [301]
Well if its fora circle it would be  r ( radios, Half of the Diameter) divided by 9
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What is the value of 0.34×9.
anastassius [24]


The answer is 3.06  

0.34

x     9

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3.06                              Just multiply 0.34*9=3.06  then count two places left to  place the  decimal point in the proper place

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Find 16% of 370. Round to the nearest 10th if necessary.
svetoff [14.1K]
Multiply 370 by 0.16 get get 16%

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3 years ago
Based on Pythagorean identities, which equation is true? A. Sin^2 theta -1= cos^2 theta B. Sec^2 theta-tan^2 theta= -1 C. -cos^2
Arturiano [62]

Answer:

D

Step-by-step explanation:

our basic Pythagorean identity is cos²(x) + sin²(x) = 1

we can derive the 2 other using the listed above.

1. (cos²(x) + sin²(x))/cos²(x) = 1/cos²(x)

1 + tan²(x) = sec²(x)

2.(cos²(x) + sin²(x))/sin²(x) = 1/sin²(x)

cot²(x) + 1 = csc²(x)

A. sin^2 theta -1= cos^2 theta

this is false

cos²(x) + sin²(x) = 1

isolating cos²(x)

cos²(x) = 1-sin²(x), not equal to sin²(x)-1

B. Sec^2 theta-tan^2 theta= -1

1 + tan²(x) = sec²(x)

sec²(x)-tan(x) = 1, not -1

false

C. -cos^2 theta-1= sin^2

cos²(x) + sin²(x) = 1

sin²(x) = 1-cos²(x), our 1 is positive not negative, so false

D. Cot^2 theta - csc^2 theta=-1

cot²(x) + 1 = csc²(x)

isolating 1

1 = csc²(x) - cot²(x)

multiplying both sides by -1

-1 = cot²(x) - csc²(x)

TRUE

3 0
3 years ago
Write an algebraic expression for the verbal expression the sum of g squared and four.
frez [133]

Answer:

g^2 + 4

I literally do not know how to explain it. I solved this problem with the clues like sum and squared. I looked at where these words were located.

3 0
3 years ago
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