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vagabundo [1.1K]

2 years ago

10

Marcus is buying CDs. They add up to $31 before tax. the sales tax rate where he lives is 5 percent. How much will his CDs cost

including tax?

2 answers:

mart [117]2 years ago

7 0

$32.55

$31 x 5% = $1.55

$1.55 + $31 = $32.55

ollegr [7]2 years ago

5 0

5% × 31

(5 ÷ 100) × 31

(5 × 31) ÷ 100

155 ÷ 100

1.55

31 + 1.55= 32.55

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If isme estimated that there are 50 students in the seventh grade class but there are actually 40 what is isme’s percent error?

Temka [501]

The percent error is 25 %

<em><u>Solution:</u></em>

Given that it is estimated that there are 50 students in the seventh grade class, but there are actually 40

<em><u>To find: percent error</u></em>

Percent error is the difference between a measured and known value, divided by the known value, multiplied by 100%

<em><u>The formula for percent error is given as:</u></em>

$\text{ percent error }=\frac{\text { approximate value }-\text {exact value}}{\text { exact value }} \times 100$$

Here, exact value = 40 and approximate value or estimated value = 50

Substituting the values in above formula,

$\begin{aligned}&\text { percent error }=\frac{50-40}{40} \times 100\\\\&\text { percent error }=\frac{10}{40} \times 100=\frac{100}{4}=25\end{aligned}$

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3 years ago

Find the measure of angle x in the figure below<br><br>A.35°<br>B.47°<br>C.51°<br>D.62°

Dafna11 [192]

First of all, we know that a line is 180°. This means if we add the angles of 61°, 57°, and angle y, we should get 180<span>°.

$\sf 61\textdegree +57\textdegree+y=180\textdegree$

Simplify:

$\sf 118\textdegree +y=180\textdegree$

Subtract 118° to both sides:

$\sf y=62\textdegree$

We also know that all three angles of a triangle add up to 180<span>°. So we have:

$\sf 67\textdegree+62\textdegree +x=180\textdegree$

Simplify:

$\sf 129\textdegree +x=180\textdegree$

Subtract 129° to both sides:

$\sf x=\boxed{\sf 51\textdegree}$
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egoroff_w [7]

Answer:

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Step-by-step explanation:

Given parameters:

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Unknown:

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Darya [45]

Answer:

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Step-by-step explanation:

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