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lapo4ka [179]
3 years ago
11

Solve: 7/9=21/(ANSWER)

Mathematics
2 answers:
Citrus2011 [14]3 years ago
5 0
The answer is A 27 because 7/9 = 21/27
dlinn [17]3 years ago
4 0
The answer is A. 27 It is just a proportion
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I’m not really much sure, I tried.
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3 years ago
Which line shows theINITIAL error in volume work?
aliina [53]

In step 2, V = \frac{4}{3}(3.14)(37.5) show the error in volume work.

Solution:

Given data:

The steps shows it is sphere.

Radius of the sphere = 12.5

The value of π = 3.14

Volume of the sphere = \frac{4}{3} \pi r^3

Step 1:

$V=\frac{4}{3} (3.14)(12.5)^3

$V=\frac{4}{3} (3.14)(12.5)(12.5)(12.5)

Step 2:

$V=\frac{4}{3} (3.14)(1953.125)

Step 3:

$V=\frac{4}{3} (6132.81)

Step 4:

V = 8177.08 cubic units

This is the correct solution.

But in the given options, in step 2, 12.5 is multiplied by 3.

That is not the correct step. You have to do 12.5 × 12.5 × 12.5.

Hence in step 2, V = \frac{4}{3}(3.14)(37.5) show the error in volume work.

7 0
3 years ago
X-4y=-22 solve for y
Arturiano [62]
Add 4y to both sides of the equation:
x=4y-22
Now replace x in the equation:
(4y-22)-4y=-22
Distribute the negative sign:
-4y+22-4y=-22
Add common terms:
-8y+22=-22
Add 8y to both sides of the equation:
8y-22=22
Add 22 to both sides of the equation:
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Divide both sides by 8:
y=5.5
9 0
3 years ago
What is the measure of <R? ​
Verdich [7]

Answer:

<R=23°

Step-by-step explanation:

The sum of angles in a triangle is 180°

So, <R + <S + <T = 180°

<R+90°+67°=180°

<R+157°=180°

<R=23°

7 0
3 years ago
When 7 is subtracted from three times a certain number, the result is 28.<br> what is the number
OverLord2011 [107]

Answer: 35/3 or 11.6

Step-by-step explanation:

3x-7=28

Add 7 to each side

3x=35

Divide by 3

6 0
2 years ago
Read 2 more answers
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