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3 years ago

15

8 is what percent of 64?

1 answer:

pav-90 [236]3 years ago

6 0

Answer:

12.5%

Step-by-step explanation:

8/64

(8*100)/64 = 12.5

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A fireman's ladder leaning against a house makes an angle of 50° with the ground. How long is the ladder if the ladder is 8 feet

antoniya [11.8K]

The ladder would be 12.4 feet hope that helps

5 0

3 years ago

Greg runs 3 miles in 28 minutes. At the same rate, how many miles would he run in 42 minutes?

Paladinen [302]

Answer:

4.5

miles

Step-by-step explanation:

Well, he runs

3

miles in

28

minutes. Also, see that

42

=

28

⋅

1.5

.

So, his journey would just be running

1.5

times, with each time running

28

minutes.

So, he runs a total of

1.5

⋅

3

=

4.5

miles

7 0

3 years ago

Read 2 more answers

What is the measure of angle CAE??

raketka [301]

M <CAE = 360 - 240 = 120 degrees answer

4 0

3 years ago

Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

<u>Completing the square</u>

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

5 0

1 year ago

The diagram below shows a sign that Annie designed. It is made of two circles that share the same center. Annie wants to use str

Pavel [41]

132 in

Step-by-step explanation:

Take the total radius = 18+3 = 21= R (say)
Simply use the formula for the circumference i.e. 2*pi*R
2*22/7*21= 132

3 0

2 years ago