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sladkih [1.3K]
3 years ago
9

There are 80 students in a 8th grade, 20% are boys. How many boys are in 8th grade?

Mathematics
1 answer:
astraxan [27]3 years ago
7 0

Answer:

16 boys

Step-by-step explanation:

Lets go with easy example:

20% of 100 students means 20 students: what is done there

  • We converted 20% to 20/100 so

\frac{20}{100}*100=20

Lets do the same with 80 students as well

\frac{20}{100}*80=16

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Anyone wanna help?please
timama [110]

\large\underline{\underline{\red{\rm\blue{\longmapsto} Step-by-step\: Explanation:-}}}

Given to points to us are :-

  • ( 3 , -6 )
  • ( -1 , -8 )

( As these are plotted on graph with yellow dots .)

Now , we can use Distance Formula , which is :-

\boxed{\pink{\tt Distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}}}

Here ,

  • x1 = 3 .
  • x2 = -1.
  • y1 = (-6)
  • y2 = (-8).

<u>→ Substituting the respective values , </u>

⇒ Distance = √ [ { 3 - (-1)}² + { -6 -(-8)²} ] .

⇒ Distance = √ (3+1)² + (8-6)²

⇒ Distance = √ 4² + 2²

⇒ Distance = √ 16 + 4

⇒ Distance = √20 = √4 × √5

⇒ Distance = 4√5units .

<u>Hence the distance between two points is 4√5u.</u>

3 0
3 years ago
Which measure is equivalent to 126 in. ? 1 ft = 12 in. 1 yd = 3 ft 3 yd 3. 5 yd 10. 5 yd 31. 5 yd.
denis23 [38]

Answer:

3.5 YARD

Step-by-step explanation:

3.5 x 3= 10.5x12= 126

6 0
2 years ago
Simplify 9 + 6k +3 +212 +3 +7​
melisa1 [442]

Answer:

6k+234

Step-by-Step Explanation:

Add 9, 3, 212, 3, and 7. You get 234. You can't change 6k because the variable, so you end up with 6k+234.

8 0
2 years ago
Read 2 more answers
Reggie earns $12.65 per hour and works 38 hours per week. How much does he warm in a week before taxes are taken out?
nexus9112 [7]
Reggie earns $480.70 a week before taxes are taken out.
6 0
3 years ago
Solve 4X^2+7 = 8X +4 by using the quadratic formula
Sergio [31]

Answer:

(1.5,0)

(.5,0)

Step-by-step explanation:

Quadratic formula below

We first need to move everything to one side of the equation

4x²-8x+3=0

Then plug everything in

(8±√(-8²-4*4*3))/(2*4)

(8±√16)/8

To calculate the ± we need to do when where it's adding and then negative

we have

(8+4)/8=3/2

and hten

(8-4)/8=1/2

4 0
3 years ago
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