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3 years ago

I NEED HELP WITH THIS!! Question: solve the one-step equation. r-6=7

Mathematics

2 answers:

Mamont248 [21]3 years ago

8 0

The answer of r-6=7 it is 13

scoray [572]3 years ago

3 0

Answer:

r = 13

Step-by-step explanation:

r-6=7

Add 6 to each side

r-6+6=7+6

r = 13

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3. An art class charges each student $3 to attend plus a fee for supplies. Today, $20 was collected for the 5 students attending

Igoryamba

Answer:

tax =1

Step-by-step explanation:

20=5(3+x)

4=3+x

x=1

x as in tax

3 0

2 years ago

The measure of one angle of an octagon is twice the measure of one of the other seven congruent angles. What is the measure of e

kondaur [170]

Each one of the smaller angles x = 120 degrees and the larger angle = 2x = 2 × 120 = 240 degrees

<h3>How to find the angle of octagon?</h3>

The angle of an octagon can be found as follows;

An octagon is a polygon that has 8 sides.

The sum of angles in an octagon is 1080 degrees.

Therefore,

x + x + x + x + x + x + x + 2x = 1080

Hence,

9x = 1080

divide both sides by 9

x = 1080 / 9

x = 120

Therefore, each one of the smaller angles x = 120 degrees and the larger angle = 2x = 2 × 120 = 240 degrees

learn more on octagon here:brainly.com/question/8517157

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5 0

2 years ago

A contractor has submitted bids on three state jobs: an office building, a theater, and a parking garage. State rules do not all

german

Answer:

The following are the answer to this question:

Step-by-step explanation:

In the given question the numeric value is missing which is defined in the attached file please fine it.

Calculating the probability of the distribution for x:

$\to f(x) = 0.19\ for \ x=14\\\\\to f(x) = 0.29 \ for\ x=7\\\\\to f(x) = 0.38\ for \ x=1\\\\\to f(x)=0.14 \ for \ x=0\\$

The formula for calculating the mean value:

$\bold{ E(X)= x \times f(x)}$

$=14 \times 0.19+7 \times 0.29+1 \times 0.38+0\times 0.14\\\\=2.66 + 2.03+0.38+ 0\\\\=5.07$

$\bold{E(X^2) = x^2 \times f(x)}$

$=14^2 \times 0.19+7^2 \times 0.29+1^2 \times 0.38+0^2 \times 0.14 \\\\=196 \times 0.19+ 49 \times 0.29+1 \times 0.38+0 \times 0.14\\\\= 37.24+ 14.21+ 0.38+0 \\\\=51.83$

use formula for calculating the Variance:

$\to \bold{\text{Variance}= E(X^2) -[E(X)]^2}$

$= 51.83 - (5.07)^2\\\\= 51.83 - 25.70\\\\=26.13$

calculating the value of standard deivation:

Standard Deivation (SD) = $\sqrt{Variance}$

$= \sqrt{26.13} \\\\=5.111$

6 0

4 years ago

Round 440.221281415 to 2 decimal places

Snezhnost [94]

Answer:

440.22

Step-by-step explanation:

got two decimals back

5 or more round next door

4 or less kill the rest

8 0

3 years ago

the perimeter of a pool table is 30 ft.The table is twice as long as it is wide.what is the length of the pool table.

noname [10]

Perimeter is legnth +legnth + width + width or
P=2L+2W

L=2W
subsitute L=2W for L in P=2L+2W

P=2(2W)+2W
P=4W+2W
P=6W

we know that Perimiter=30 so
30=6W
divide both sides by 6
5=Width

subsitute W=5 for W in L=2W
L=2(5)
L=10

to check
10=2(10)+2(5)
30=20+10
30=30
checks

Legnght=10
Width=5

4 0

4 years ago