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2 years ago

Pls help this is for my young sibling and it should be done now

Mathematics

1 answer:

Nookie1986 [14]2 years ago

4 0

1) Red

2) 920

Hope this helps!
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In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. Calculate the percent

Vilka [71]

Answer: 9.70%

Step-by-step explanation:

The formula to find the percentage error is given by :-

$\%\text{ error}=\dfrac{|\text{Estimate-Actual}|}{\text{Actual}}\times100$

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g

Estimated mass of zinc oxide used by pharmacist =31.1 g

Now, $\%\text{ error}=\dfrac{|31.1-28.35|}{28.35}\times100$

i.e. $\%\text{ error}=\dfrac{2.75}{28.35}\times100$

i.e. $\%\text{ error}=9.70017636684\approx9.70\%$

Hence, the percentage of error on the basis of the desired quantity.= 9.70%

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3 years ago

y varies directly as x, y=14 when x=18. Determine x when y=31. Estimate your answer to two places after the decimal, if necessar

laiz [17]

Y : x
14 : 18
31 : x
18*31/14=x
39.85714286

ANSWER
x=39.86

8 0

2 years ago

80 percent of x is equal to 100<br><br> What is x?

Stella [2.4K]

Answer:

125

Step-by-step explanation:

$80\% \: of \: x = 100 \\ \\ 0.8x = 100 \\ \\ x = \frac{100}{0.8} \\ \\ x = 125$

4 0

3 years ago

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Solve the equation. Check your answer.<br> 4|2x - 2|= 32

Eva8 [605]

Answer:

−

Explanation:

First divide throughout by

to get

Now take the square root on both sides to get

You may now substitute the values of

and

−

back into the original equation and check that it satisfies the equation which it does.

Step-by-step explanation:

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2 years ago

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Wspppppppppppgutssssss

alexgriva [62]

Answer:

Yes

Step-by-step explanation: There are four apples.

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2 years ago