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Orlov [11]
3 years ago
15

PLZ PLZ PLZ SOMEONE HELP ME!!!

Mathematics
1 answer:
sergiy2304 [10]3 years ago
8 0
Step 4 is wrong. the answer is 1/8, she changed sign on 2^(-3) to 2^(3) without moving it to numerator
You might be interested in
Calculate the average speed for the following sections on the graph.
Dimas [21]

Answer:

A to B = 2000 m/s

C to D = 30,000m/s

Step-by-step explanation:

A to B is 10secs and the distance is 200m so you multiply them and you get 2000m/s

C to D is 60secs and the distance is 500m so you multiply and you get 30,000m/s

3 0
2 years ago
Read 2 more answers
What is the value of 6 in 70,681? Explain how you know.
Dafna11 [192]

Answer:

it's 100

Step-by-step explanation:

70000

0000

600

80

1

I don't know if you understand

6 0
1 year ago
What is -2(6a-2b+4c-9)
scoray [572]

Answer:

-12a + 4b - 8c + 18

Step-by-step explanation:

To do this, you will need to use the Distributive Property. Multiply the number outside of the parenthesis by the terms inside of the parenthesis.

-2(6a - 2b + 4c - 9) becomes:

-12a + 4b - 8c + 18

8 0
3 years ago
Read 2 more answers
X^2 -18x +81=0 factor it
nasty-shy [4]

Answer:

x=9

Step-by-step explanation:

81 is the product of -9 & -9. -9-9=-18. Therefore, (x-9)^2=0, and you get that x=9.

6 0
3 years ago
Mon wants to make 5 lbs of the sugar syrup. How much water and how much sugar does he need to make 75% syrup?
Julli [10]

Answer:

He needs 3.75 lbs of sugar and 1.25 lbs of water.

Step-by-step explanation:

Let x lbs be the amount of sugar in the syrup. Then 5-x lbs is the amount of water in this syrup.

Note

5 lbs - 100%

x lbs - 75%

Write a proportion:

\dfrac{5}{x}=\dfrac{100}{75}

Cross multiply:

100x=5\cdot 75\\ \\100x=375\\ \\x=\dfrac{375}{100}=3.75

So, he needs 3.75 lbs of sugar and 5 - 3.75 = 1.25 lbs of water.

7 0
2 years ago
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