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3 years ago

Don't need an answer anymore :[

Mathematics

1 answer:

sergeinik [125]3 years ago

5 0

Answer:

why.

what question was it

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PLEASE HELP ASAP! A mountain climber is at an altitude of 2.9 mi above the earth’s surface.

shutvik [7]

You can use Pythagorean theorm to solve.

$a^2 + b^2 = c^2$
C = 3959 + 2.9 = 3961.9

x = ???? = a
b = 3959
Plugin our data.
$a^2 + b^2 = c^2$
$a^2 + 3959^2 = 3961.9^2$
$a^2 + 15673681 = 15696651.61$
$a^2 = 22970.61$
$\sqrt{a^2} = sqrt{22970.61}$
$a = 151.560$
$x = 151.560$
$x = 151.6$

7 0

3 years ago

4 pencils and 3 crayons are 20.9 inches. 5 pencils and 4 crayons are 26.5 inches. Each pencil is the same length as the other pe

erastova [34]

Answer:

The length of the pencils is 4.1 inches and for the crayons 1.5 inches

Step-by-step explanation:

We can solve by means of a 2x2 system of equations, we have to:

let "x" be the length of the pencils

let "y" be the length of the crayons

4 * x + 3 * y = 20.9

5 * x + 4 * y = 26.5 => x = (26.5 - 4 * y) / 5

Replacing:

4 * (26.5 - 4 * y) / 5 + 3 * y = 20.9

21.2 - 3.2 * y + 3 * y = 20.9

-0.2 * y = 20.9 - 21.2

y = -0.3 / -0.2

y = 1.5

now for x:

x = (26.5 - 4 * 1.5) / 5

x = 4.1

This means that the length of the pencils is 4.1 inches and for the crayons 1.5 inches

5 0

3 years ago

Find the slope of the line that passes through the two points. (12,-5) and (10,-4)

hichkok12 [17]

Given parameters:

First point = (12, -5)

Second point = (10, -4)

Unknown:

Slope of the line = ?

Slope is simply the vertical rise divided by the horizontal distance.

Slope = $\frac{Rise }{horizontal distance}$

Simply to find slope;

Slope = $\frac{y_{2} - y_{1} }{x_{2} - x_{1} }$

First point = (12, -5), x₁ = 12 and y₁ = -5

Second point = (10, -4), x₂ = 10 and y₂ = -4

Input the parameters:

Slope = $\frac{-4 -(-5)}{10 - 12}$

= $\frac{-4 + 5}{-2}$

= - $\frac{1}{2}$

The slope of the line is - $\frac{1}{2}$

7 0

3 years ago

Rewrite the following numbers in their best form

timurjin [86]

A. 70.105
b. 950
c. 0.0072

5 0

3 years ago

What is the equation for this graph? A. y=2x + 1 B. y=1/2x + 1 C. y=1/2x D. y=2x

MrRa [10]

B is the answer :)))

8 0

3 years ago