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3 years ago

How do I divide a decimal by a decimal?

Mathematics

1 answer:

Luba_88 [7]3 years ago

3 0

For example, 11., 3/3=1 right? But when there is a decimal, add a zero. 21/3=7, so the answer is 107.

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The average of three test scores is 82. The scores on the first test and the third test are the same. The score on the second te

kondaur [170]

Answer:

Step-by-step explanation:

Let x = the test

(x + x + ( x - 6))/3=82

((3x - 6)/3) • 3= 82 • 3

3x - 6 + 6 = 246 + 6

3x = 252

3 3

x = 84

5 0

3 years ago

In the circle below, DB = 22 cm, and m<DBC = 60°. Find BC. Ignore my handwriting.

Karo-lina-s [1.5K]

Answer:

$BC=11\ cm$

Step-by-step explanation:

step 1

Find the measure of the arc DC

we know that

The inscribed angle measures half of the arc comprising

$m\angle DBC=\frac{1}{2}[arc\ DC]$

substitute the values

$60\°=\frac{1}{2}[arc\ DC]$

$120\°=arc\ DC$

$arc\ DC=120\°$

step 2

Find the measure of arc BC

we know that

$arc\ DC+arc\ BC=180\°$ ----> because the diameter BD divide the circle into two equal parts

$120\°+arc\ BC=180\°$

$arc\ BC=180\°-120\°=60\°$

step 3

Find the measure of angle BDC

we know that

The inscribed angle measures half of the arc comprising

$m\angle BDC=\frac{1}{2}[arc\ BC]$

substitute the values

$m\angle BDC=\frac{1}{2}[60\°]$

$m\angle BDC=30\°$

therefore

The triangle DBC is a right triangle ---> 60°-30°-90°

step 4

Find the measure of BC

we know that

In the right triangle DBC

$sin(\angle BDC)=BC/BD$

$BC=(BD)sin(\angle BDC)$

substitute the values

$BC=(22)sin(30\°)=11\ cm$

6 0

3 years ago

Can someone please explain to me where my teacher got the -3x - 15y = -135 from? I understand how to do this but I have no idea

Phoenix [80]

Answer:

she got those numbers from the angles angle shape

Step-by-step explanation:

im middle school and i dont know how to solve this but i see its not that completad

6 0

3 years ago

Question 2 Multiple Choice Worth 1 points)

likoan [24]

Answer:

Solution: means we replace 'x' with 'x+1' and we get g (x). Let us put x = 0 and then y = 0 to find two points on coordinate axis to easily plot the graph of g (x). Now, let us put y = 0 and find out x. So, second point is . Now, let us plot A and B then extend the line joining AB.

4 0

3 years ago

PLZ HELP ASAP!!! the choices are A. 5(7 + 4) B. 5(7 + 7) C. 7(5 + 4) D. 7(4 + 7)

Alinara [238K]

A. 5(7 + 4)
is correct

7 0

2 years ago

Read 2 more answers