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Phoenix [80]
3 years ago
7

What is the value of x in the equation 2x + 9 = 21? (4 points) 2 6 9 15

Mathematics
2 answers:
RoseWind [281]3 years ago
8 0
2x=12
2x divided by
12 divided by 2
Equals
X=6
RSB [31]3 years ago
3 0
It's 6 because 21-9=12, 2x=12, x=12\2, x=6
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X + 2y = 10<br><br> y=x-4<br> Choices are:<br> (0,4)<br> (2,6)<br> (6,2)<br> (8,0) <br> Work shown
LuckyWell [14K]

Answer:

C) (6,2)

Step-by-step explanation:

Rewrite equations:

y=x−4;x+2y=10

Step: Solve y=x−4for y:

y=x−4

Step: Substitute x − 4 for y in x+2y=10:

x+2y=10

x+2(x−4)=10

3x−8=10(Simplify both sides of the equation)

3x−8+8=10+8(Add 8 to both sides)

3x=18

3x

3

=

18

3

(Divide both sides by 3)

x=6

Step: Substitute6forxiny=x−4:

y=x−4

y=6−4

y=2(Simplify both sides of the equation)

Hope this helps!

:)

5 0
3 years ago
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A medium pizza cost $8.60. She has $54 to spend on pizzas how many medium pieces can she afford​
s344n2d4d5 [400]

Answer:

About six medium pizzas

Step-by-step explanation:

54 dollars in all

8.60 dollars each

54 divided by 8.60

3 0
3 years ago
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What is the surface area of the cube?(please and put your answer as a number without a unit.)
Ulleksa [173]
Answer: 817
Hope that helps
8 0
3 years ago
Hurry! Somebody that’s expert or who knows this pls answer this. MATH WORK.
My name is Ann [436]
50 degrees
180 degrees
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5 0
2 years ago
( 70 POINTS BRAINLIST) an offshore windmill is partly submerged in the ocean. it's tallest point is 120 meters above sea level i
alexdok [17]

Answer:

half of it would be 45

Step-by-step explanation:

120 - 30 = 90

90 divided by 2 = 45

hope this helped! sorry if i didn't answer your question, i was a little bit confused on what you wanted us to solve:)

if u want to find the length of it, it would be 150 because 120 + 30 = 150

7 0
2 years ago
Read 2 more answers
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