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3 years ago

14

What is 3/5 of 21? plz answer the question

2 answers:

aleksley [76]3 years ago

7 0

The answer is 12.6, the fractional answer is 12 3/5

WITCHER [35]3 years ago

5 0

It's 12.6.
You divide 21 by the denominator, 5, and multipy that (4.2) by the numerator, 3.

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X + 2y =6<br> X- y =3<br> Solution?

VikaD [51]

Since one equation has a negative y and the other has a positive y, I'm going to use those since they cancel each other out. Before that, the two y's need to be equal to each other.

x+2y=6
x-y=3

Multiply the bottom equation by two so then you have:

x+2y=6
2x-2y=6

The y's now cancel out:

x=6
2x=6

Add them together

3x=12

Divide

x=4.

To find y, plug x into either equation (*don't have to do both, but I will)

(4)+2y=6
(4)-y=3

Subtract four

2y=2
-y=-1

Divide each

2y/2 = 2/2
y=1

-y/-1 = -1/-1
y=1

The answer is:
x=4
y=1

I hope that helps!

4 0

3 years ago

Read 2 more answers

Plz help me 2x+y=4 4x+2y=8

aleksklad [387]

Answer: Y= 2 X=1

Step-by-step explanation:

2x+y=4 4x+2y=8

2x =/2 2y= /2

y=2 4x=4

/4= /4

X= 1

6 0

3 years ago

Read 2 more answers

Angle C is an inscribed angle of circle P. Angle C measures (3x + 5)° and arc AB measures (16x)°. Find x.

dezoksy [38]

Check the picture below.

solve for "x".

8 0

2 years ago

your school is planning to bring 193 students to watch the competition cheerleaders perform in hershey. there are eight drivers

Vinil7 [7]

Answer:

7 buses

Step-by-step explanation:

51 divided by 8 = 6 and you still have 3 students letf so you have to use one more bus

5 0

2 years ago

A red ant travels 9/8 inches in 3/4 minutes and 3 3/8 inches in 2 1/4 minutes what is the ants speed in inches per minute? What

I am Lyosha [343]

Answer:

1. 1.5 inches per minute

2. 90 inches per hour

Step-by-step explanation:

speed = $\frac{distance}{time}$

1. total distance covered = $\frac{9}{8}$ + $\frac{27}{8}$

= $\frac{9+27}{8}$

= $\frac{36}{8}$

= 4 $\frac{1}{2}$ inches

Total time taken = $\frac{3}{4}$ + $\frac{9}{4}$

= $\frac{3 +9}{4}$

= $\frac{12}{4}$

= 3 minutes

The ants average speed = $\frac{4.5}{3}$

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

= 1.5

The ants speed is 1 $\frac{1}{2}$ inches per minute.

2. Since;

60 minutes = 1 hour

3 minutes = x hours

x = $\frac{3}{60}$

= $\frac{1}{60}$

= 0.05 hours

Speed = $\frac{4.5}{0.05}$

= 90 inches per hour

The red ants speed is 90 inches per hour.

3 0

2 years ago