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labwork [276]
3 years ago
8

What is the value of the expression 2m + m - 4(-2m +1-m) When m -8?

Mathematics
1 answer:
timama [110]3 years ago
5 0

Answer:

The answer should be -124.

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Mrs. Simpson drove 105 miles in 2 1/2 hours. What was Mrs. Simpson's average speed in miles per hour?
harkovskaia [24]
105 m = 2.5 h
 
x miles = 1 hour

You cross multiply since it's a proportion:
2.5 * x
105 * 1

=

2.5x = 105

Then you divide everything by 2.5

The answer is 42




5 0
3 years ago
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When is a zero not significant?
fomenos

Answer: A. When it comes after the decimal point, as in 4.000

Step-by-step explanation: If there are no other numbers after the zeros, there is no reason for them to be place holders. Zeros in decimals act as place holders such as in 4.09 or 4.0009. This actually does change the value of the decimal but 4.000 is just the same as a regular old 4. Hope this helps!

7 0
3 years ago
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A student finished a 30 question test in 75 minutes. Which rate best represents the relationship between the number of minutes s
blagie [28]

Answer:

2.5 minutes per quesiton

Step-by-step explanation:

75 minutes to take 30 quesitons means you divide the time equally so

75/30

5 0
3 years ago
Please answer correctly! I will mark you as Brainleist!
kiruha [24]

Answer:

V ≈ 1847.26

Step-by-step explanation:

<u>Circular Cone Formulas in terms of radius r and height h:</u>

The volume of a cone:

V = (1/3)πr2h

Slant height of a cone:

s = √(r2 + h2)

Lateral surface area of a cone:

L = πrs = πr√(r2 + h2)

The base surface area of a cone (a circle):

B = πr2

The total surface area of a cone:

A = L + B = πrs + πr2 = πr(s + r) = πr(r + √(r2 + h2))

Therefore, the solution V = πr 2h / 3 = π·142·9/  3 ≈ 1847.25648

4 0
3 years ago
Which statements about the graph of the function f(x) = –x2 – 4x + 2 are true? Check all that apply.
Ipatiy [6.2K]
Statements 2, 3, and 5 are true based on the graph of this function.

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3 years ago
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