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3 years ago

Can someone plzzz help with this ill give a pizza :((

Mathematics

1 answer:

nydimaria [60]3 years ago

7 0

$22 \times 18 = (20 + 2)(20 - 2) = {20}^{2} - {2}^{2} = 396$

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I thought of a number, I added 1 3 4 to it, then I multiplied the result by 2 2 11 and I got 8. What was my number?

Valentin [98]

Given:

In a number, adding $1\dfrac{3}{4}$ , then multiplying the result by $2\dfrac{2}{11}$ we get 8.

To find:

The unknown number.

Solution:

Let the unknown number be x.

According to the question,

$(x+1\dfrac{3}{4})\times 2\dfrac{2}{11}=8$

$(x+\dfrac{1\times 4+3}{4})\times \dfrac{2\times 11+2}{11}=8$

$(x+\dfrac{4+3}{4})\times \dfrac{22+2}{11}=8$

$(x+\dfrac{7}{4})\times \dfrac{24}{11}=8$

Multiply both sides by $\dfrac{11}{24}$ .

$x+\dfrac{7}{4}=8\times \dfrac{11}{24}$

$x+\dfrac{7}{4}=\dfrac{11}{3}$

Subtract $\dfrac{7}{4}$ from both sides.

$x=\dfrac{11}{3}-\dfrac{7}{4}$

$x=\dfrac{44-21}{12}$

$x=\dfrac{23}{12}$

$x=1\dfrac{11}{12}$

Therefore, the required number is $1\dfrac{11}{12}$ .

3 0

3 years ago

Find the measure of the angle that is 15x.

Naddika [18.5K]

15x would be the vertical angle of 16x -8 and since vertical angles are equal, then 15x = 16x -8.

15x = 16x -8
x = 8 and so the angle 15x = 15 * 8
which equals 120 degrees.

8 0

3 years ago

Which gives the equivalent decimal form of the fraction 14/16 ? 4.0073 0.7005 0.875 4.7003

Vaselesa [24]

It is 0.875. because 14 ÷ 16 is 0.875

8 0

4 years ago

Pleaaaase i neeed heeeelp

4vir4ik [10]

Answer:

b. (x-3) / (x+1)

c. x/(x+5)

Step-by-step explanation:

b. (x+2)(x-3) / (x+1)(x+2)

c. x(x - 5) / (x + 5 ( x - 5)

= x / x+5

4 0

3 years ago

Find the population mean or sample mean as indicated.<br> Sample: 17, 11, 8, 12, 22

Dominik [7]

Answer:

mean:12

Step-by-step explanation:

6 0

3 years ago