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kari74 [83]
3 years ago
10

Simplify -2(3 +1) + 5

Mathematics
2 answers:
Serga [27]3 years ago
8 0

Answer:

-3

Step-by-step explanation:

-2(4)+5 = -8+5= -3

Hope this helps :D

salantis [7]3 years ago
6 0

Answer:

-3 can i pplzz have brainliest

Step-by-step explanation:

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there are 7 outcomes.

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Hope this helps!!! Brainliest?!

Step-by-step explanation:

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Two equiangular decagons are congruent.<br> Sometimes/Always/Never
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Two equiangular decagons are sometimes congruent.

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consider these graphs: Eric thinks the equation y=(x-3)^2 will match the blue graph. Jenney thinks it will match the red graph.
Dimas [21]

Answer: Jenny

Step-by-step explanation:

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3 0
3 years ago
The height of a triangle is 8ft greater than the base. The area of the triangle is 136.5 square ft. Find the length of the base
mixer [17]

Answer:

the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

Step-by-step explanation:

Note that the formula for the area of a triangle is A = (1/2)(base)(height).  Let's abbreviate that to A = (1/2)(b)(h).   We are told that h = b + 8.

Then A = 136.5 = (1/2)(b)(b + 8), or

               (after multiplying both sides by 2)

          A = 273 = b^2 + 8b

                which, when put into standard quadratic form, becomes:

b^2 + 8b - 273 = 0

The coefficients of this quadratic are a = 1, b = 8 and c = -273.

Thus, the discriminant is b^2 - 4ac, or 64 - 4(1)(-273) = 1156 = 17^2.

The roots are then

      -8 ± √1156            -8 ± 17

x = --------------------  =  ------------ = 9/2 and -25/2

              2                          2

Only the root 9/2 makes sense here, because measurements of length are positive.

Thus, the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

3 0
3 years ago
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