All categories

2 years ago

Hello! Please help. "Find the error & explain why it is wrong."

Mathematics

1 answer:

mixas84 [53]2 years ago

5 0

Answer: Step E

Step-by-step explanation:

The error is in the last step. In Step D, we see that we're supposed to subtract the second part from the first part. We also see we have the terms 2x-8 in the numerator on the right. Since we're subtracting, the expression should actually be -2x +8. 3 -2x +8 should be -2x +11 which is not the numerator in Step E so the last step is wrong.

You might be interested in

Can someone please help me with this question?

Hatshy [7]

The answer is 168 seconds.

4 0

3 years ago

Louie is trying to find a rectangular canvas for his art project. Its width must measure 20 inches and form a 35° angle with the

riadik2000 [5.3K]

Answer:

tan(35) = x/20

20(tan(35)) = x

14.0 in. = x

14.0 inches

Step-by-step explanation:

use trigonometry to figure out the height.

3 0

3 years ago

Read 2 more answers

Evaluate the expression for the given value of the variables.

zzz [600]

For every c substitute 4 and for every d substitute -2

c=4
d=-2

6c + 5d - 4c - 3d + 3c - 6d

= 6(4)+ 5(-2)- 4(4)- 3(-2)+ 3(4)- 6(-2)

=24+(-10)-16-(-6)+12-(-12)

=24-10-16+6+12+12

=28

7 0

2 years ago

In 1975 1000 tons of coal was manufactured. It is 10% greater in 1976 and 5% less in 77. What is the final about of coal in 1977

Digiron [165]

In 1975 it was 1000tons, ok, well, in 1976 it went up by 10%, how much is a 10% increase?

$\bf \begin{array}{ccllll}
coal&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1000&100\\
x&100+10
\end{array}\implies \cfrac{1000}{x}=\cfrac{100}{100+10}\implies \cfrac{1000\cdot 110}{100}=x
\\\\\\
1100=x$

well, in 1976 it was 1100 tons then, and in 1977 it went down by 5% of 1100, well, if we take 1100 to be the 100%, then what is a 5% decrease?

$\bf \begin{array}{ccllll}
coal&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1100&100\\
x&100-5
\end{array}\implies \cfrac{1100}{x}=\cfrac{100}{100-5}\implies \cfrac{1100\cdot 95}{100}=x$

5 0

3 years ago

A water tank is leaking water at a rate of 300 gallons per minute. What is this rate in gallons per second

irakobra [83]

Answer:

5 gallons per second

Step-by-step explanation:

Step 1:

300 ÷ 60 = 5

Answer:

Hope This Helps :)

5 0

3 years ago

Read 2 more answers