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3 years ago

John wrote 1/5 of a paper in 1/4 of an hour how long did it take him to write an entire paper?\

Mathematics

1 answer:

MatroZZZ [7]3 years ago

7 0

Answer:

$1\frac{1}{4}\ hours$

Step-by-step explanation:

we know that

using proportion

$\frac{(1/4)}{(1/5)}\frac{hour}{paper}=\frac{x}{1}\frac{hour}{paper} \\ \\x=5/4\ hours$

covert to mixed number

$5/4\ hours=1\frac{1}{4}\ hours$

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What is the coeficient of a+3b

stiks02 [169]

Answer:

The coefficient is 3

Step-by-step explanation:

The definition of a coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4xy).

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3 years ago

Which sum or difference is modeled by the algebra tiles? A. (x2 4x − 2) (x2 − 2x − 4) = 2x2 2x 2 B. (x2 4x − 2) (x2 2x 4) = 2x2

dimulka [17.4K]

Answer:

Because (-x²+2x+3)+(-x²-2x-1) = -x²+2x+3-x²-2x-1 = -2x²+2

Step-by-step explanation:

Hope It Helps!

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2 years ago

Given two points M & N on the coordinate plane, find the slope of MN , and state the slope of the line perpendicular to MN .

telo118 [61]

Answer:

Problem 1) $m = \dfrac{1}{4}$ $slope_{perpendicular} = -4$

Problem 2) $m = \dfrac{1}{3}$ $slope_{perpendicular} = -3$

Step-by-step explanation:

$slope = m = \dfrac{y_2 - y_1}{x_2 - x_1}$

$slope_{perpendicular} = \dfrac{-1}{m}$

Problem 1) M(9,6), N(1,4)

$slope = m = \dfrac{6 - 4}{9 - 1} = \dfrac{2}{8} = \dfrac{1}{4}$

$slope_{perpendicular} = \dfrac{-1}{\frac{1}{4}} = -4$

Problem 2) M(-2,2), N(4,-4)

$slope = m = \dfrac{4 - 2}{4 - (-2)} = \dfrac{2}{6} = \dfrac{1}{3}$

$slope_{perpendicular} = \dfrac{-1}{\frac{1}{3}} = -3$

4 0

3 years ago

2^5 over 4 = 2^5 over 2a = 2^b = c What are a b and c

likoan [24]

Answer:

a = 2

b = 3

c = 8

Step-by-step explanation:

2^5/4=2^5/2a=2^b=c

2^5/4, 2^5 = 32, 32/4 = 8

so c, being what all of this is equal to, is 8

2^5/2a, 2*2=4

so a = 2

2^b = 8, ∛8 = 3

so b = 3

Hope my explanation makes sense :)

6 0

3 years ago

Help if you can but this is kinda urgent any help is welcome tho

Ivanshal [37]

Answer:

(Change in y)/(change in x) is defined as the average rate of change.

For a linear equation:

y = a*x + b

A is the average rate of change, and is called the "slope" of the linear equation, and this is a constant.

Then the sentence will be:

"The average change between two ordered pairs (x,y) is the ratio (change in x)/(change in y)

In a linear function, this is called the slope, and it is constant"

4 0

3 years ago