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3 years ago

What is -2 sqrt20 - sqrt125

Mathematics

1 answer:

alexdok [17]3 years ago

5 0

Answer:

-9sqrt(5)

Step-by-step explanation:

-2 sqrt20 - sqrt125

Lets simplify the square roots

sqrt(ab) = sqrt(a)sqrt(b)

-2 sqrt(4) sqrt(5) - sqrt(25) sqrt(5)

-2 *2sqrt(5) - 5sqrt(5)

-4sqrt(5) -5sqrt(5)

-9sqrt(5)

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65 mi/hr for 90 min???

Feliz [49]

Answer:

97.5 miles

Step-by-step explanation:

=65mi=60 min

All you need to do is add half of 65

=65+32.5

=97.5 miles

So therefore in 90 minutes you would drive 97.5 miles

7 0

3 years ago

What is the area of a section of pavement that is 20 ft wide and 70 yd long?

myrzilka [38]

Answer:

A = 4200 ft^2

Step-by-step explanation:

We know the formula for area is

A = l*w

We need to have the same units

convert yd to ft

1 yd = 3ft

Multiply each by 70

70 yds = 210 ft

A = 210 *20

A = 4200 ft^2

6 0

4 years ago

25/10 as a mixed number

nata0808 [166]

2 1/2

10 goes into 25 2 times with a remainder of 5 so , you get 2 5/10
5/10 reduces to 1/2

7 0

3 years ago

Read 2 more answers

Which two solid figures have the same volume? A. An oblique solid with a base of 4 cm2 and a height of 8 cm B. A cone with a bas

kkurt [141]

In general, Volume is equal to the area of the base multiplied by the height.

Let's check the volume of each.

V=area of base x height, all given, so,

$V=4*8=32$

Volume of cone is given by,

V= one-third area of base x height, all given, so,

$V=\frac{1}{3}*4*8= \frac{32}{3}$

Here, the slant height is given, not the altitude (height). The volume is not 32 nor $\frac{32}{3}$ .

Rectangular solid's volume is area of base times height, all given, so,

$V=4*8=32$

Hence, A and D have same volume.

ANSWER: Option A and Option D have the same volume (32)

8 0

4 years ago

A fence post is 7 feet tall. A chain is attached to the top of the fence post and fastened to the ground 5 feet from the base of

Vanyuwa [196]

The length of the chain is 2 feet

5 0

3 years ago