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astraxan [27]
3 years ago
15

Mary is traveling cross country on a road trip. So far, Mary has traveled 200 miles in her car and 200 miles by train. The car t

raveled at a
rate that was 30 miles per hour slower than the train.
Mary modeled the total time for her trip with the following expression.
200 + 20030
What does x - 30 represent in this situation?
Mathematics
2 answers:
Scilla [17]3 years ago
7 0

Answer:

x-30 is the equation used to determine the car's speed in mph.

Step-by-step explanation:

VikaD [51]3 years ago
5 0

Answer:

i dont know i think it is 11?!? srry if im wrong

Step-by-step explanation:

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The answer I got was 59.2 
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B

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Please help with this on the picture
galina1969 [7]
Answer:

a) 81

b) 16,807

c) 100

d) 78125

Step-by-step explanation:

a)

3^2 x 3^2

Step 1. Simplify the exponents

3^2 = 3 x 3 = 9

Step 2. Multiply

9 x 9 = 81
••••••••••••••••••••••••••••••••

b)

7 x 7^4

Step 1. Simplify the exponent

7^4 = 7 x 7 x 7 x 7 = 2401

Step 2. Multiply

7 x 2401 = 16,807
••••••••••••••••••••••••••••••••

c)

10^9 divided by 10^7

Step 1. Simplify the exponents

10^9 = 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 1000000000

10^7 = 10 x 10 x 10 x 10 x 10 x 10 x 10 = 10000000

Step 2. Divide

1000000000 divided by 10000000 = 100
••••••••••••••••••••••••••••••••

d)

5^8 divided by 5

Step 1. Simplify the exponent

5^8 = 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 = 390625

Step 2. Divide

390625 divided by 5 = 78125



7 0
2 years ago
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