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3 years ago

Find the slope between (1, 3/4) and (1, 2)

1 answer:

5 0

$(x_1;\ y_1);\ (x_2;\ y_2)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\\\\\left(1;\ \dfrac{3}{4}\right);\ (1;\ 2)\\\\m=\dfrac{2-\frac{3}{4}}{1-1}=\dfrac{2\frac{3}{4}}{0}!!!\ Divsion\ by\ zero!!!\\\\Answer:The\ slope\ is\ not\ exist.$

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A cylinder has a base area of 154 cm² and a height of 20cm. What is its total surface area, in cm?? Use, 22/7

zmey [24]

Answer:

Hi there!

We've given with the base area and height. We know the formula for base area

Base area = πr²

154 = 22/7 × r²

154 × 7/22 = r²

49 = r²

√49 = r

7 = r

Now

TSA = 2πr(h + r)

TSA = 2 × 22/7 × 7(7 + 20)

TSA = 44(27)

TSA = 1188 cm²

5 0

3 years ago

Jane is 5 times older than her sister. In 3 years, Jane’s sister will be 1/4 her age. Find the ages now

Korolek [52]

The present age of Jane is 45 years old and present age of her sister is 9 years old

Solution:

Let the present age of Jane be "x"

Let the present age of her sister be "y"

Jane is 5 times older than her sister

present age of Jane = 5(present age of her sister)

x = 5y ---------- eqn 1

In 3 years, Jane’s sister will be 1/4 her age

Age of sister after 3 years = 3 + y

Age of jane after 3 years = 3 + x

Age of sister after 3 years = 1/4(age of jane after 3 years)

$3 + y = \frac{1}{4}(3 + x)$

Substitute eqn 1 in above equation

$3 + y = \frac{1}{4}(3 + 5y)\\\\12 + 4y = 3 + 5y\\\\5y - 4y = 12 - 3\\\\y = 9$

Substitute y = 9 in eqn 1

x = 5(9)

x = 45

Thus present age of Jane is 45 years old and present age of her sister is 9 years old

3 0

4 years ago

What is the value of this expression? (23 – 3) + (6 x 9)

Semmy [17]

Answer:

Step-by-step explanation:

(23-3)+(6×9)

(20) +(54)

=74

6 0

2 years ago

A photo that is 4 in wide and 6 in high is enlarged to a poster that is 3ft wide and 4 1/2 ft high what is the ratio of the widt

ankoles [38]

1:9 would be the ratio

8 0

3 years ago

Read 2 more answers

Find the slope of the line on the graph. Reduce all fractional answers to lowest terms.

Vera_Pavlovna [14]

Answer:

Explanation:

Slope formula:

y₂ - y₁ / x₂ - x₁

2 - (-2) / 2 - (-2)

2 + 2 / 2 + 2

4 / 4

= 1

6 0

3 years ago

Read 2 more answers