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Inessa05 [86]
3 years ago
8

PLEASE HELP! WILL GIVE BRAINLIEST!

Mathematics
1 answer:
ANTONII [103]3 years ago
8 0

Answer:

(18+21+17+x)÷4=20

x=24 students

Step-by-step explanation:

(18+21+17+x)÷4=20

(56+x)÷4=20

56+x=20*4

56+x=80

x=80-56

x=24

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30/2 =15

V = (15)(10)

V = 150 cubic units

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Step-by-step explanation:

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Bob wants to create two pens, as shown in the figure. One pen is for a garden and it needs a heavy duty fence to keep out the cr
sattari [20]
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notice... the dog's pen perimeter, does not include the side that's bordering the garden's, since that side will use the heavy duty fence, instead of the light one

so, the sum of both of those costs, will be the C(x)

\bf C(x)=\left( 30x+\cfrac{82320}{x} \right)+\left( 10x+\cfrac{27440}{x} \right)&#10;\\\\\\&#10;C(x)=40x+\cfrac{109760}{x}

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8 0
3 years ago
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lisabon 2012 [21]
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6 0
3 years ago
What is the height of the tree in the image below? 10 points Wall 4 6 ft 24 O I foot O 36 foot None of the above
Zinaida [17]

16 ft

Explanation

Step 1

because the ligth comes in the same angle, we have 2 similar triangles .

so,as the triangles are similar,the ratio of the shorter leg to the bigger leg must be equal.

\begin{gathered} ratio=\frac{shorter\text{ leg}}{\text{bigger leg}} \\ ratio1=ratio2 \\ \frac{h}{24}=\frac{4}{6} \end{gathered}

Step 2

solve for h

\begin{gathered} \frac{h}{24}=\frac{4}{6} \\ \text{cross multiply} \\ 6\cdot h=4\cdot24 \\ 6h=96 \\ \text{divide boths} \\ \frac{6h}{6}=\frac{96}{6} \\ h=16 \end{gathered}

therefore, the heigth of the tree is 16 ft

5 0
1 year ago
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