Help please 5 points

Help due soon <br> find the area using 3.14 for π<br> round to the nearest Hundredth if you have too

andrey2020 [161]

Answer:

Circumference is about 185.26 cm.

Area is about 2732.585 $cm^{2}$

Step-by-step explanation:

Circumference = 2πr

2 x 3.14 x 29.5 = 185.26

Area of a circle = π $r^{2}$

3.14 x 29.5 x 29.5 = 2732.585

7 0

3 years ago

Rae earns $8.40 an hour plus an overtime rate equal to 1(1/2)times her regular pay for each hour worked beyond 40 hours. What ar

Nitella [24]

Answer:

At $8.40 an hour for a 40 hour week the earnings would be $336. With 5 hours overtime the pay would be $12.60 an hour which equals $63 making her earnings a total of $399 for the 45 hour work week. would be Step-by-step explanation:

5 0

3 years ago

Which of these is an example of software?

MaRussiya [10]

A) windows, I learned this in a tech class I took

6 0

3 years ago

I NEED HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Nina [5.8K]

I believe the answer is the 64 ounce container that is $3.20. the unit price of it was 0.05 while the other one was 0.055

7 0

3 years ago

Read 2 more answers

Q3). <br><br>0.4x + 0.3y = 1.7 <br>0.7x - 0.2y = 0.8 <br><br>Solve it by using substitution method.

Yuki888 [10]

Step-by-step explanation:

$\green{\large\underline{\sf{Solution-}}}$

<u>Given pair of linear equations are </u>

$\rm :\longmapsto\:0.4x + 0.3y = 1.7 \\ \\ \rm :\longmapsto\:0.7x - 0.2y = 0.8$

can be rewritten as on multiply by 10,

$\rm :\longmapsto\:4x + 3y = 17 - - - - (1)\\ \\ \rm :\longmapsto\:7x - 2y = 8 - - - - - (2)$

From equation (2)

$\rm :\longmapsto\:2y = 7x - 8$

$\rm\implies \:\boxed{\tt{ y = \frac{7x - 8}{2}}} - - - - (3)$

On substituting the value of y in equation (1), we get

$\rm :\longmapsto\:4x + 3\bigg( \dfrac{7x - 8}{2} \bigg) = 17$

$\rm :\longmapsto\:\dfrac{8x + 21x - 24}{2} = 17$

$\rm :\longmapsto\:29x - 24 = 34$

$\rm :\longmapsto\:29x = 34 + 24$

$\rm :\longmapsto\:29x = 58$

$\bf\implies \:x = 2 - - - - (4)$

On substituting x = 2 in equation (3), we get

$\rm :\longmapsto\:y = \dfrac{7 \times 2 - 8}{2}$

$\rm :\longmapsto\:y = \dfrac{14 - 8}{2}$

$\rm :\longmapsto\:y = \dfrac{6}{2}$

$\bf\implies \:y = 3$

So, we get

$\begin{gathered}\begin{gathered}\bf\: \rm :\longmapsto\:\begin{cases} &\bf{x = 2} \\ \\ &\bf{y = 3} \end{cases}\end{gathered}\end{gathered}$

<h3><u>Verification</u></h3>

From equation (1),

$\rm :\longmapsto\:0.4x + 0.3y = 1.7$

On substituting the value of x and y, we get

$\rm :\longmapsto\:0.4(2) + 0.3(3) = 1.7$

$\rm :\longmapsto\:0.8 + 0.9 = 1.7$

$\rm :\longmapsto\:1.7 = 1.7$

<h3><u>Hence, Verified </u></h3>

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<h3><u>Basic Concept :-</u></h3>

To solve systems using Method of Substitution, follow this procedure:

1. Select one equation and solve it for one of its variables.

2. In the other equation, substitute the value of one variable evaluated in step 1 to reduced the equation to one variable.

3. Solve the equation to get the value of this variable

4. Substitute the value found in to first equation involving both variables and solve for the other variable.

3 0

2 years ago