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3 years ago

6

Andy estimated that he would need 71 feet of lumber for a tree house project. He later found that the actual amount of lumber ne

eded was 60 feet. What was the percent error of Andy's estimation?
18.33%

15.49%

11%

84.51%

2 answers:

zhenek [66]3 years ago

4 0

$x = \frac{60}{71}$
x = 0.845070423
x = 84.5070423 %
<span>x ~= 84.51%</span>

Fudgin [204]3 years ago

4 0

Answer:

the correct answer is 18.33

Step-by-step explanation:

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The difference of two perfect cubes is 386. If the cube root of the smaller of the two numbers is 7, then the cube root of the l

choli [55]

Answer:

9

Step-by-step explanation:

Let the two perfect cubes be x and y where x > y.

According to the given conditions:

${x}^{3} - {y}^{3} = 386...(1) \\ y = 7...(2) \\ plug \: y = 7 \: in \: equation \: (1) \\ {x}^{3} - {7}^{3} = 386 \\ {x}^{3} - 343 = 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 729 \\ x = \sqrt[3]{729} \\ x = 9$

Thus the cube root of the larger number is 9.

8 0

3 years ago

Which is greater -3 or -1/3 ?

GenaCL600 [577]

Answer:

<u>-1/3</u>

Step-by-step explanation:

because it is a negative number and closer to zero than -3 is making it greater, becuase it is closer to a positive number.

6 0

2 years ago

Read 2 more answers

imagine reporting a question like if you dont like it just go to anothr question like yall be pressed for what.... love yall tho

mario62 [17]

Answer:

what the heck

was that also i'm country

Step-by-step explanation:

4 0

3 years ago

Plzz help me im giving 12 points

Serggg [28]

This Is very simple.

30m + 50 = 20m + 100

This is the new equation needed to solve for m.
first we must isolate "m".

30m + 50 = 20m + 100
- 50 - 50

30m = 20m + 50
-20m -20m

10m = 50

divide both sides by 10 to isolate "m".

m = 5

hope this helps!

3 0

3 years ago

Solve. -7x=x^2+12 help

Nat2105 [25]

Hey There!

The answer to your problem is $x=-3$ or $x=-4$ both answers are correct!

<u>Step 1: Subtract x²+12 from both sides.</u>

−7x−(x²+12)=x²+12−(x²+12)

−x²−7x−12=0

<u>Step 2: Factor left side of equation.</u>

$(-x-3)(x+4)=0$

<u>Step 3: Set factors equal to 0.</u>

$-x-3=0$ or $x+4=0$

<u>Get your answer:</u>

$x=-3$ or $x=-4$

3 0

3 years ago