MATHEMATICS MIDDLE SCHOOL

80% of a number is 96. What is 25% of that same number?

A.
20

B.
30

C.
40

D.
120

Answers

Answer 1
Answer: (80)/(100)*x=96 ⇒ (80/20)/(100/20) *x=96

(4)/(5)*x=96 ⇒ x= (96*5)/(4)=24*5

\boxed {x=120}

(25)/(100)*x= (25/25)/(100/25)*120 = (120)/(4) = \boxed {30}

The answer is B.
Answer 2
Answer: let the number be x
80%*x=96
x=96/80%
x=120
then 25% of 120 is your answer to find this half 120 twice
half 120=60
half 60=30

Therefore 30 is the answer which is B

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What is the total surface area of a right rectangular prism with a base of 2 cm by 3 cm and a height of 6 cm? A) 13 cm2. B) 72 cm2. C) 113 cm2. D) 226 cm2.

Answers

Answer:=72\ cm^2,

Step-by-step explanation:

The total surface area of a right rectangular prism is given by :-

\text{Total surface area}=2(lw+wh+hl), where h is height, w is width and l is length of the prism.

Given: Height = 6 cm

Dimensions of base =  2 cm by 3 cm

Now, the total surface area of a given right rectangular prism is given by :-

\text{Total surface area}=2(2\cdot+3\cdot6+2\cdot6)=2(6+18+12)=2(36)=72\ cm^2,
 (L · W · 2) + (perimeter of the base · height). For this prism, that's (2 cm · 3 cm · 2) + (2 cm + 2 cm + 3 cm + 3 cm) · 6 cm. This is (12 cm2) + (10 cm · 6 cm) = 72 cm2.

Laura earns $2.90 more per hour than her friend, Jess. Write an equation to show how much Jess earns per hour. Use j to represent her hourly rate.How much does Jess earn if she works 20 hours

Answers

Answer:

Equations are

J=j →  (1)

L=$2.90+J=$2.90+j  →   (2)

Jess earn $20j in 20 hours

Step-by-step explanation:

Given that Laura earns $2.90 more per hour than her friend, Jess.

we have to write an equation to show Jess earns per hour.

As j represents hourly rate of Jess i.e

Jess earns $j per hour.

∴ J=j →  (1)

As Laura earns $2.90 more per hour than her friend, Jess

⇒ L=$2.90+J=$2.90+j  →   (2)

Eq (1) and (2) are required equation.

we have to find how much Jess earn in 20 hours

Hours=20

∴ In 1 hr Jess earn $j

In 20 hrs Jess earn $ 20j
Valid Equation: 2.90x-J
"X" equals how much Laura Makes

Ellie has $30 in a savings account that earns 7% interest. How much will she have in total in 5 years? A.$10.50 B.$1050 C. $40.50 D. $32.50

Answers

Assuming simple interest.

Simple Interest =  PRT/100

Simple Interest  =  30 * 7 * 5 /100 =  10.50

Simple Interest = $10.50

Amount = Principal + Interest = $30 + $10.50 = $40.50

(C)

Help me with this please I don't exactly get it

Answers

Answer:

P = 40.56 in (ANS)

Step-by-step explanation:

radius = 8/2 = 4 in

semi-circle perimeter = pi * R = 3.14 * 4 = 12.56 in

figure perimeter = 12.56 + 10 + 8 + 10 = 40.56 in (ANS)

An eight stud lego brick is 3.2 cm long.If you lay 36 bricks end to end what is the length of the line of bricks?

Answers

3.2cm x 36=115.2cm

115.2cm/12= 9.35 in or 3 feet 
if you multiply 3.2 anf 36 together you would get 115.2 cm

1,000 more than 37,568 isa.36,568 b.37,468
c.37,668 d.30,000

Answers

i would have to say none of them are correct :(
1000 more than 37568 would be 38568
it is a.36,568 because if u subtract 37,568 from 1,000 that gets u the answer
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