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babymother [125]
3 years ago
10

78 = -2 (m + 3) + m Solve for m

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
5 0

Answer:

-37.5

Step-by-step explanation:

Vedmedyk [2.9K]3 years ago
4 0

Answer:

Step-by-step explanation:

78 = -2 (m + 3) + m

Opening bracket

78 = -2m - 6 + m

Collecting like terms

78 + 6 = -m

-m = 84

m = -84

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3x+-1=5x
3x-1=5x
3x-1-5x=5x-5x
-2x-1=0
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6 0
3 years ago
Phil has two rectangular prisms. The height of the second prism is 1/2 times the height of the first prism. The lengths and widt
Vesnalui [34]

The volume of the second prism is also ten times the volume of the first prism.

Let's assume that both prisms have:

width = 3 units

height = 4 units

Prism 1 length = 5 units

Prism 2 length = 50 units

Let's solve their respective volumes to compare...

Volume of prism 1 = length * width * height

                             = 5 * 3 * 4

                             = 60 units ^3

Volume of prism 2 = 50 * 3 * 4

                             = 600 units ^3

Prism 2/ prism 1 = 10

That means prism 2 is ten times the volume of prism 1.

6 0
2 years ago
Best Deal 1
scoray [572]

Answer:

C) 18 cents

Step-by-step explanation:

Given,

This weeks deal -

Quantity of Flour      Price ($)         Price per pound ($)

3 pounds                    5.25                 (5.25/3) =  1.75

5 pounds                    9.75                 (9.75/3) =   1.95

7 pounds                    12.60                (12.60/3) = 1.80

10 pounds                  14.20                 (14.20/3) = 1.42

12 pounds                  18.24                 (18.24/3) = 1.52

The lowest price per pound is $1.42. Therefore, this is the current week's best deal.

The last week's best deal was = $`1.60/pound

The difference between the unit price for previous week's best deal and this week's best deal = $1.60 - $1.42 = $0.18

Therefore, 18 cents.

8 0
3 years ago
There are 480 sophomores and 520 juniors in a high school. Find the ratio of juniors to sophomores
kow [346]

Answer:

13:12, 13 to 12, or 13/12

Step-by-step explanation:

520:480

Divide both numbers by GCF (40)

13:12

4 0
2 years ago
This is confusing I need help .
Fittoniya [83]

Answer:

  • x = 54
  • angle ACD = 124°

Step-by-step explanation:

The rule is that the exterior angle (ACD) is equal to the sum of the remote interior angles (the two marked angles on the right).

You are expected to use this relation to write and solve an equation.

  exterior angle = angle D + angle B

  (2x +16) = 58 + (x+12)

  2x +16 = x +70

  x + 16 = 70

  x = 54

Then angle ACD is ...

  angle ACD = (2x +16)° = (2·54 +16)°

  angle ACD = 124°

8 0
2 years ago
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