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Delicious77 [7]
3 years ago
15

Ab+2c when a=3 and b=2 and c=-4

Mathematics
2 answers:
Crank3 years ago
8 0
Ab+2c
=(3)(2) + 2(-4)
=6-8
= -2
Kruka [31]3 years ago
5 0

Answer:

c,-14 im on it now that how i know

Step-by-step explanation:

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Someone help what the area of Demi's poster
Airida [17]

the center square is 20 x 20 = 400

there are 4 12 x 20 areas

12*20 = 240*4 = 960

960+400 = 1360 square inches

3 0
3 years ago
Please help!! I do not understand:(((
Aneli [31]

Answer:

A

Step-by-step explanation:

y=(x+13)^2-14

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4 0
3 years ago
Linda can bicycle 48 miles in the same time as it takes her to walk 12 miles. She can ride 9 mph faster than she can walk. How f
Marrrta [24]

Answer:

\frac{48}{r+9}=\frac{12}{r}

Step-by-step explanation:

Let r represent Linda's walking rate.                      

We have been given that Linda can ride 9 mph faster than she can walk, so Linda's bike riding rate would be t+9 miles per hour.

\text{Time}=\frac{\text{Distance}}{\text{Rate}}

We have been given that Linda can bicycle 48 miles in the same time as it takes her to walk 12 miles.

\text{Time while riding}=\frac{48}{r+9}

\text{Time taken while walking}=\frac{12}{r}

Since both times are equal, so we will get:

\frac{48}{r+9}=\frac{12}{r}

Therefore, the equation \frac{48}{r+9}=\frac{12}{r} can be used to solve the rates for given problem.

Cross multiply:

48r=12r+108

48r-12r=12r-12r+108

36r=108

\frac{36r}{36}=\frac{108}{36}

r=3

Therefore, Linda's walking at a rate of 3 miles per hour.

Linda's bike riding rate would be t+9\Rightarrow 3+9=12 miles per hour.

Therefore, Linda's riding the bike at a rate of 12 miles per hour.

7 0
3 years ago
Woul I use open or close intervals for x - 1 < 5
JulijaS [17]

Hi there!

You would use open intervals.

In the given inequality, the "<" sign is used, which means "greater than".

Open intervals would be used unless the inequality uses "≤" or "≥", which

mean "equal to or greater/less than". Closed brackets would be used in this

instance.

4 0
3 years ago
The volume of the rectangular prism is 60x3 + 145x2 + 70x. factor to find the possible expressions for length, width and height
madam [21]
The possible dimensions of the prism will be evaluated as follows:
<span>60x3 + 145x2 + 70x
factoring out 
factoring out 5x we get:
5x(12x^2+29x+14)
factoring the quadratic we get:
5x(3x+2)(4x+7)
hence the dimensions are:
5x by (3x+2) by (4x+7)</span>
8 0
3 years ago
Read 2 more answers
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