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____ [38]
3 years ago
6

PLEASE HELP ME WITH THIS

Mathematics
2 answers:
dimulka [17.4K]3 years ago
3 0
B. 31.5 ft^2 because you find the area of each rectangle and add them and then find the area of the triangle and add it in to get 31.5 ft^2
taurus [48]3 years ago
3 0
3 x 5 = 15ft
3 x 4 = 12ft
3 x 3 = 9 divided by 2 = 4.5
15 + 12 + 4.5 = 31.5 ft
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Mrs. Donelly drew the triangle above on the chalkboard and asked her students to write down possible side lengths for a, b, and
GenaCL600 [577]

Answer:

a=2;b=4;c=6.

Louis wrote the correct answer.

4 0
2 years ago
Help help help help​
Butoxors [25]

Answer:

g=3

Step-by-step explanation:

f(g) = g^2 +3g

Let f(g) = 18

18 =  g^2 +3g

Subtract 18 from each side

18-18 =g^2 +3g-18

0 = g^2 +3g-18

Factor

0 = (g+6) (g-3)

Using the zero product property

g+6 =0    g-3 =0

g = -6      g =3

The only solution listed is g=3

5 0
3 years ago
A closed box with a square base is to have a volume of 85. 75 cm^3. the material for the top and bottom of the box costs ​$3.00
tiny-mole [99]

We can create two equations here:

(1) Volume = area of square * height of box

85.75 = s^2 h

(2) Cost = 3 * area of square + 1.5 * area of side box

C = 3 s^2 + 1.5 s h

 

From (1), we get:

h = 85.75 / s^2

 

Combining this with (2):

C = 3 s^2 + 1.5 s (85.75 / s^2)

C = 3 s^2 + 128.625 s-

 

Taking the 1st derivative and equating dC/ds = 0:

dC/ds = 6s – 128.625 / s^2 = 0

Multiply all by s^2:

6s^3 – 128.625 = 0

6s^3 = 128.625

s = 2.78 cm

 

So h is:

h = 85.75 / s^2 = 85.75 / (2.78)^2

h = 11.10 cm

 

So the dimensions are 2.78 cm x 2.78 cm x 11.10 cm

 

The total cost now is:

C = 3 (2.78)^2 + 1.5 (2.78) (11.10)

C = $69.47

8 0
3 years ago
Convert 570 cm to hm
Ainat [17]
0.057 is the correct answer! Have a great week!
4 0
3 years ago
NEED HELP NOW PLEASE!!! Will give Brainlyist points
astra-53 [7]
It’s -1 the guy above me is right
6 0
2 years ago
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