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Naya [18.7K]
2 years ago
13

Evaluate the expression using the given value of the variable. 4 – 2x + 5x when x = 4 16 –24 –18 28

Mathematics
1 answer:
Snowcat [4.5K]2 years ago
3 0

Answer:

A) 16

Step-by-step explanation:

The question is:

Evaluate the expression using the given value of the variable.

4-2x+5x  when x = 4

A) 16

B) -24

C) -18

D) 28

Solution:

Given expression:

4-2x +5x

Plugging in x = 4 in the expression

⇒ 4-2(4)+5(4)

⇒ 4-8+20

⇒ 16

So the expression evaluates to 16 when we put x = 4

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The volume of a prism is 48 cubic centimeters. If the length is 2 centimeters and the width is 4 centimeters. What is the height
Pie

Answer:

6

Step-by-step explanation:

volume is (lwh) since youre trying to find the height just multiply the 2 and 4 together to get 8. Then divide 8 by 48 to get your height.

4 0
2 years ago
How much does a customer pay for an article marked at $50 if a sales tax of 6% is charged?
Brrunno [24]

Answer:

53$

Step-by-step explanation:

6% of 50 is 3, 50+3=53

6 0
2 years ago
70 points and i’ll give brainliest!! please answer all the questions on the page! must show work and how you got the answer. ple
Bezzdna [24]

6. One variable only so pretty straightforward.

length-x+4

width-x

x+x+4=80

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x=38

x+4=42

answer: length 42cm and width 38cm

7. Another money problem!

n-# of nickels

q-# of quarters

n=3+q

0.05n+0.25q=2.85

Substitution works like a charm!

0.05(3+q)+0.25q=2.85

0.15+0.05q+0.25q=2.85

0.3q=2.7

q=9

n=3+q

n=3+9

n=12

answer: 9 nickels and 12 quarters

8. One variable situation again.

Ann's money-2b+9

Betty's money-b

b+2b+9=60

3b=51

b=17

2b+9=43

answer: Ann has $43 and Betty has $17.

9. # of red m&m's-x+1

# of blue m&m's-x

x+1+x=13

x=6

x+1=7

answer: 6 blue and 7 red m&m's

10. a-number of adult tickets

s-number of student tickets

a+s=785 ----> a=785-s

5a+2s=3280

5(785-s)+2s=3280

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s=215

a+s=785

a+215=785

a=570

answer: 215 children tickets and 570 adult tickets

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2 years ago
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35% of 80 is what number
Elden [556K]

Answer:

35/100 *80=25

Step-by-step explanation:

4 0
2 years ago
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