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4 years ago

The expression −8x3(7x6 − 3x5) is equivalent to?

Mathematics

1 answer:

Mama L [17]4 years ago

3 0

Answer:

-56x^9+24x^8

Step-by-step explanation:

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When a number is increased by 13, the result is 43. What equation fits this statement?

Vera_Pavlovna [14]

Answer:

30+13=43

Step-by-step explanation:

when you increase 30 by 13 you end up with 43

6 0

3 years ago

Negative one half plus negative one sixth equals what fraction

TiliK225 [7]

Answer:

-2/3

Step-by-step explanation:

$\frac{-1}{2} +\frac{-1}{6}$ Find a common denominator.

$=\frac{-1*3}{2*3} +\frac{-1}{6}$ Multiply -1/2 by 3/3.

$=\frac{-3}{6} +\frac{-1}{6}$

$=\frac{-3-1}{6}$ Combine the fractions

$=\frac{-4}{6}$

$=\frac{-2}{3}$ Reduced to lowest terms. (-4 and 6 are divisible by 2)

8 0

3 years ago

Find the measure of angle B

Irina18 [472]

Answer:

Step-by-step explanation:

Use the Law of Cosines for this. If we want the measure of angle B, then the equation is set up like this:

$b^2=a^2+c^2-2accosB$

Filling in:

$9^2=14^2+6^2-2(14)(6)cosB$ and simplifying a bit:

81 = 196 + 36 - 168cosB and a bit more:

81 = 232 - 168cosB and even more:

-151 = -168cosB and divide both sides by -168 to get

.9378881988 = cosB

Now use the 2nd button on your calculator along with the cos button to find the missing angle. Make sure your calculator is in degree mode first. Your angle should be 20.30012152

8 0

3 years ago

Kesia knows that 1/4=0.25. Explain how she could use this fact to determine the decimal equivalent of 5/8

STatiana [176]

She knows that
$0.25 = \frac{1}{4} = \frac{2}{8}$
$\frac{5}{8} = \frac{2}{8} + \frac{2}{8} + \frac{1}{8} = \\ 0.25 + 0.25 + \frac{0.25}{2} = \\ 0.25 + 0.25 + 0.125 = 0.625$

4 0

4 years ago

Read 2 more answers

Can someone pls help asap

barxatty [35]

Answer:

b complementary angle

6 0

3 years ago

Read 2 more answers