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Galina-37 [17]
3 years ago
13

Joe is finding the length of a rectangular prism. The volume of the prism is 204 ft3. The width is 3.5 ft, and the height is 5 f

t. His work is shown below.
V = l w h. 204 = 3.5 (5) l. 204 = 8.5 l. StartFraction 204 Over 8.5 EndFraction = StartFraction 8.5 Over 8.5 EndFraction l. 24 = l.

What error did Joe make?
He incorrectly substituted into the volume formula.
He added 3.5 and 5 when he should have multiplied them.
He incorrectly divided 204 by 8.5.
He did not make a mistake in finding the length of the prism.
Mathematics
2 answers:
zmey [24]3 years ago
8 0

Answer:

B. He added 3.5 and 5 when he should have multiplied them.

Step-by-step explanation:

Let's observe Joe's steps:

- V = lwh

- 204 = 3.5 * (5) * l

Here, * means to multiply, so we're supposed to multiply 3.5 to 5, which would give you the answer 17.5. Unfortunately, look what Joe got: he obtained the value of 8.5, and if we observe, 3.5 + 5 = 8.5.

That's how we know that Joe added instead of multiplied, as he should have done. Thus, the answer is B.

TEA [102]3 years ago
8 0

Answer:

He added 3.5 and 5 when he should have multiplied them.

Step-by-step explanation:

Volume = length × width × height

204 = 3.5 × 5 × length

204 = 17.5 × lenth

length = 204/17.5

length = 11.65714286

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The length of a rectangular playing field is 5m longer than its width. If the perimeter of the field is 150m,find it's width​
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Answer:

35

Step-by-step explanation:

Make equations, l = w+5 and 2l + 2w = 150

Substitute w+5 into 2l + 2w = 150

Simplify to get 4w + 10 = 150

Subtract 10 from both sides to get 4w = 140

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First find 60% of 145 =

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Please help no one else can and I am confused
Reptile [31]

just multiply 45 time 31!

3 0
3 years ago
Help please!!!!!!!!!
REY [17]

Since all triangle's angle's values add up 180 degrees, this means we have to make sure to angles add up to 180.

A. 75 + 35 = 110. 180 - 110 = 70 degrees.

B. This triangle is isosceles meaning 2 of its sides is the same length. In this case, the two sides add up to 140 (meaning they are both 70 degrees). 180 - 140 =  40 degrees.

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D. This is another isosceles triangle. 180 - 36 = 144.

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