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Pepsi [2]
3 years ago
15

On a road trip, Yousef drove the same distance everyday for 8 days. On the ninth day, he drove 100 km. He drove a total of

Mathematics
1 answer:
OLga [1]3 years ago
4 0

Answer:

8x+100=1700

Step-by-step explanation:

8x+100=1700

8x+100-100=1700-100

8x=1600

8/8x=1600/8

x=200

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insens350 [35]
Answer is $14, I think.
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3 years ago
What is 7/4 times by 7/3
ehidna [41]

Answer:

49/12

Step-by-step explanation:

you multiply the top number by the second top number and the bottom number by the second bottom number so 7 x 7 = 49 and 4 x 3 = 12, so the answer is 49/12

7 0
3 years ago
Solve the system of equations by substitution 3x+y=9z
poizon [28]

Answer:

x = 1.27

y = 5.18

Step-by-step explanation:

to solve this system of  equation by simultaneous equation we say that let

3x+y=9.............................. equation 1

-5x+2y=4 .......................... equation 2

from equation 1

3x+y=9.............................. equation 1

y = 9 -3x.............................. equation 3

substitute the value of y = 9 -3x into equation 2

-5x+2y=4 .......................... equation 2

-5x + 2( 9 -3x) = 4

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collect the like terms

18 - 4 = 6x + 5x

14 = 11x

divide both side by 11

14/11 = 11x/11

x = 14/11

x = 1.27

put the value of x = 1.27 into  equation 3

y = 9 -3x.............................. equation 3

y = 9 - 3( 1.27)

y = 9 - 3.82

y = 5.18

<em>to check if you are correct put the value of x and y into either equation 1 or equation 2.</em>

<em>3x+y=9.............................. equation 1</em>

<em>3( 1.27) + 5.18 = 9</em>

<em>3.81 + 5.18 = 9</em>

<em>9 = 9</em>

3 0
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Solve for the given time.
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8851.86

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5 0
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Answer:

(6 x $1.25) + (20 x $0.80)

5 0
3 years ago
Read 2 more answers
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