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3 years ago

What percent is of 80 is 15?

Mathematics

1 answer:

pashok25 [27]3 years ago

4 0

Answer:

The answer is 18.75

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(a + b)² = a² + 2ab + b2 with step by step explanation

Dahasolnce [82]

Step-by-step explanation:

Given: (a+b)²

To prove: (a+b)² = a² + 2ab + b²

Proof:-

(a+b)² = (a+b)(a+b)

(a+b)²=a(a+b)+b(a+b)

(a+b)² = a²+ab+ab+b²

(a+b)² = a²+2ab+b².

3 0

3 years ago

Division problem help pls

zepelin [54]

Answer: B. D. E. F.

Step-by-step explanation:

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3 years ago

The highlighted regions are bases. What is the lateral surface area of

Natali5045456 [20]

Answer:

Option "C" is the correct answer to the following question.

The lateral surface area of cube = 144 Ft²

Step-by-step explanation:

Given:

Side of cube = 6 Ft

Find:

The lateral surface area of cube =?

Computation:

⇒ The lateral surface area of cube = 4a²

⇒ The lateral surface area of cube = 4 × 6 × 6

⇒ The lateral surface area of cube = 144 Ft²

All sides of the cubes are equal. The lateral surface area of cube is also known as the curved surface area of the cube.

6 0

3 years ago

Solving 8 problems per minute, Fast Finn can finish his test in time. He was however, working faster, solving 10 problems per mi

mrs_skeptik [129]

Answer:

Number of problems = 240

Step-by-step explanation:

Let x be the number of questions and t be the time.

Given:

Average rate = 8 problems per minute

Fast Finn rate = 10 problems per minute

Fast Finn taken time = t - 6

We need to find the number of problems on the test paper.

Solution:

Average rate to solve test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$8 =\frac{x}{t}$

$t =\frac{x}{8}$ --------------(1)

Fast Finn rate to solve the test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$10 =\frac{x}{t-6}$

Using cross multiplication rule.

$x=10(t-6)$

$x=10t-60$

substitute $t =\frac{x}{8}$ from equation 1.

$x=10(\frac{x}{8}) -60$

Rearrange the equation as:

$x - \frac{5}{4}x = -60$

$\frac{4x-5x}{4}=-60$

$-\frac{x}{4} = -60$

Using cross multiplication rule.

$x = 60\times 4$

x = 240 problems.

Therefore, 240 problems were on the test.

4 0

3 years ago

3÷5(6×7) - 4<br><br>Plz I need help

myrzilka [38]

Answer:

- 3 and 69/70

Step-by-step explanation:

3 ÷ 5(6 × 7) - 4

3 ÷ 5(40) - 4

3 ÷ 210 - 4

1/70 ÷ 4

- 3 and 69/70

8 0

2 years ago

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What percent is of 80 is 15?​

What percent is of 80 is 15?