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Lyrx [107]
2 years ago
12

Which expression is equivalent to – 12 + (-4/5) + 31 and includes the correct justification for the equivalence?

Mathematics
1 answer:
anyanavicka [17]2 years ago
8 0

Answer:

b

Step-by-step explanation:

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Brainliest to first. I like rlly need help!
arlik [135]

Answer:

i think is (4, -4)  or (4,4).

Step-by-step explanation:

3 0
2 years ago
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The difference of Ellen’s age and her sister Mary’s age is 4 years. Ellen is 5 years less than twice Mary’s age.
Paha777 [63]

Answer:

I believe the answer is 9 years old or 8 years old.

3 0
2 years ago
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What is the answer for number 8 and pls give step by step
Pie

Answer:

Trapezoid 1 (left side):

Base 1 = 2

Base 2 = 5

Trapezoid 2 (right side):

Base 1 = 6

Base 2 = 8

Step-by-step explanation:

<u>1st trapezoid:</u>

b_1 = x

b_2 = x + 3

h = 4

Hence, area (from formula) would be:

A=\frac{h}{2}(b_1+b_2)\\A=\frac{4}{2}(x+x+3)\\A=2(2x+3)\\A=4x+6

<u>2nd trapezoid:</u>

b_1 = 3x

b_2 = 4x

h = 2

Putting into formula, we get:

A=\frac{h}{2}(b_1+b_2)\\A=\frac{2}{2}(3x+4x)\\A=1(7x)\\A=7x

Let's equate both equations for area and find x first:

4x+6=7x\\6=7x-4x\\6=3x\\x=\frac{6}{3}\\x=2

We can plug in 2 into x and find length of each base of each trapezoid.

Trapezoid 1 (left side):

Base 1 = x = 2

Base 2 = x + 3 = 2 + 3 = 5

Trapezoid 2 (right side):

Base 1 = 3x = 3(2) = 6

Base 2 = 4x = 4(2) = 8

8 0
3 years ago
A bus averages 4 miles per hour faster than a motorcycle. If the bus travels 180 miles in the same time it takes the motorcycle
klemol [59]
Can u send me a picture of the question instead please because i dont understand what ur trying to ask..
3 0
3 years ago
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PLEASE HELP!
Marrrta [24]

Answer:

15.6 feet

Step-by-step explanation:

3 0
3 years ago
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