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Talja [164]
2 years ago
5

Eric found that about 62% of 80 classmates at school like hip-hop music. However, 70% of his 60 relatives like hip-hop.

Mathematics
1 answer:
viva [34]2 years ago
5 0

Answer:

more classmates like hip-hop

step-by-step explanation:

percentages (%) are out of 100

classmates: 62% of 80 is the same thing as

\frac{62}{100}  \times 80 = 50 \: rounded \: up

relatives: 70% of 60 is the same thing as

\frac{70}{100}  \times 60 = 42

we can clearly see that more classmates like hip-hop

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The length of a rectangle is 5 yd more than double the width, and the area of the of the rectangle is 42 yd to the second power
yanalaym [24]

Answer:

The answer to your question is l = 12 and w = 7/2 or 3.5

Step-by-step explanation:

Data

length = l

width = w

Area = 42 yd²

Process

1) Write equations that help to solve this problem

Area = length x width = l x w

Length = 2width + 5  or   l = 2w + 5

2) Substitution

                       42 = lw                               Equation l

                          l = 2w + 5                        Equation ll

                       42 = (2w + 5)w                   Substitute equation ll in l

3.- Expand

                       42 = 2w² + 5w

                       2w² + 5w - 42 = 0

Solve the equation by factoring

-Multiply 2 by 42

                             2 x 42 = 84

-Find the prime factors of 84

                         84 = 2² 3 7

-Find two numbers that added gives +5 using the prime factors

 These numbers are +12 and -7    

-Substitute the values in the equation

                         2w² -7w + 12w - 42

-Factor by grouping

                        w(2w - 7) + 6(2w - 7)                  

                           (2w - 7)(w + 6)

-Find w

                    2w₁ - 7 = 0             w₂ + 6 = 0

                      w₁ = 7/2               w₂ = -6   This value is discarted because

                                                                  there are no negative values

-Find l

                     l = 2(7/2) + 5

                     l = 7 + 5

                     l = 12

7 0
3 years ago
9 x n -20 = 16 what is n?
Nostrana [21]
9 × n - 20 = 16
9n - 20 = 16
+ 20
9n = 36
÷ 9
n = 4
Hope this helps! :)

3 0
3 years ago
You would like to help your political party succeed at the local level, so you join the party's efforts by working as a
Simora [160]

Answer:

A helping to register voters in your precinct

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
15 POINTS PLEASE HELP
Anika [276]
4. x^10

5. x^3

I hope this helped! Mark me Brainliest! :) -Raven❤️
3 0
3 years ago
Steven just got a new summer job painting fences in his neighborhood. He will be paid $7.25 an hour. His first customer paid him
mote1985 [20]

Answer:

a). The equation; 7.25 h-36.25=0

b). total number of hours Steven work=5 hours

Step-by-step explanation:

Part A

The expression for the total money earned is as follows;

T=E×h

where;

T=total earnings

E=earnings per hour

h=number of hours worked

In our case;

T=$36.25

E=$7.25

h=h

replacing;

36.25=(7.25×h)

36.25=7.25 h

The equation would be; 7.25 h=36.25, or 7.25 h-36.25=0

Part B

7.25 h=36.25

h=36.25/7.25

h=5

total number of hours Steven work=5 hours

5 0
3 years ago
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