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3 years ago

Please help and give an explanation on how to find the value of x

Mathematics

1 answer:

arsen [322]3 years ago

8 0

Answer:

x = 30

2x =60

Step-by-step explanation:

the angle is a right angle- so that means it’s a 90 degree angle

so let’s set up an equation..

We get 90 degrees when we add 2x Plus x

So 2x + x = 90

then, 3x = 90

x= 30

you Can check your Answer by:

Do 2 times 30 = 60

and then 60+ 30

you will Get 90

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If a wheelchair-marathon racer moving at 13.1 miles per hour expends energy at a rate of 645 calories per hour, how much energy

Anna71 [15]

Answer:

$1290$ calories

Step-by-step explanation:

Given: The racer moves at $13.1$ miles per hour expends energy at a rate of $645$ calories per hour.

To find: Energy in calories, required to complete a marathon race $26.2$ miles at this pace.

Solution: We have,

The racer moves at $13.1$ miles per hour.

The racer expends energy at a rate of $645$ calories per hour.

So, energy expended while moving $13.1$ miles $=645$ calories.

Now, energy expended while moving $1$ mile $=\frac{645}{13.1}$ calories.

So, energy expended while moving $26.2$ miles $=\frac{645}{13.1}\times 26.2=645\times 2=1290$ calories.

Hence, $1290$ calories of energy is required to complete a marathon race $26.2$ miles at this pace.

6 0

3 years ago

Multiple Choice Find the value of x. A 5 B 215 C 52 D 1 10

olga_2 [115]

Answer:

5 x Square root:2

Step-by-step explanation:

7 0

3 years ago

Ten plus 6 times a number n is equal to 5 less than the number n.

Gala2k [10]

Answer:

Step-by-step explanation:

10+6n=n-5

6n-n=-5-10

5n=-15

n=-3

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3 years ago

What is the value of x in the equation 4x+8y=40, when y=0.8?

lubasha [3.4K]

4x+8y=40
0.8*8=6.4
4x+6.4=40
40-6.4=33.6
4x=33.6
33.6\4=8.4
X=8.4

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3 years ago

Simplify the expression (-n³+8)+(-n³+5)

Novosadov [1.4K]

When simplified the answer is -2n^3+13

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4 years ago

Read 2 more answers