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3 years ago

What are the square roots of 256? A. 15 and –15 B. 16 and –16 C. 25 and –25 D. 128 and –128

Mathematics

2 answers:

riadik2000 [5.3K]3 years ago

7 0

B: 16 and -16
two negatives = a positive
two positives make a positive :)

Crank3 years ago

5 0

16 and -16. If you do it on your calculator, it should say 16.

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Find the volume of the solid. Round to the nearest tenth if necessary.

Vikki [24]

$V= \frac{4}{3} \pi r^{3} or V=4.1888 r^{3}$

r=4 $r^{3}$ =64*4.1888=268.083

V = 268.083 $mm^{3}$ so go with A.

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3 years ago

Sandy sold half of her comic books and then brought 6 more.She now has 11.How many did she begin with?

andreyandreev [35.5K]

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2 years ago

Read 2 more answers

What is the gcf of 92 and 100

Elena-2011 [213]

$92= \textcircled{2} \times \textcircled{2} \times 23 \\
100=\textcircled{2} \times \textcircled{2} \times 5 \times 5 \\ \\
GCF(92,100)=\textcircled{2} \times \textcircled{2} =4$

The GCF of 92 and 100 is 4.

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3 years ago

Multiply each equation by a constant that would help to eliminate the y terms. 2x-5y=-21 3x-3y=-18 What are the resulting equati

anyanavicka [17]

Answer:

6x - 15y = -63

15x -15y = -90

Step-by-step explanation:

We need to multiply the two equations by a constant that will eliminate the y terms.

The two equations are:

2x - 5y = -21

3x - 3y = -18

Let us multiply the first by 3 and the second by 6. The resulting equations will be:

6x - 15y = -63

15x -15y = -90

Note: To solve the system of equations we can simply subtract the first from the second.

8 0

3 years ago

The equation for line j can be written as y=2x + 8. Another like k is perpendicular to line j and passes through the point (6,-6

Semmy [17]

Answer:

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 2x + 8 ← is in slope- intercept form

with slope m = 2

Given a line with slope m then the slope of a line perpendicular to it is

$m_{perpendicular}$ = - $\frac{1}{m}$ = - $\frac{1}{2}$ , thus

y = - $\frac{1}{2}$ x + c ← is the partial equation

To find c substitute (6, - 6) into the partial equation

- 6 = - 3 + c ⇒ c = - 6 + 3 = - 3

y = - $\frac{1}{2}$ x - 3 ← equation of line k

7 0

3 years ago