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VashaNatasha [74]
3 years ago
9

Lindsay makes $9 per hour, h, of babysitting. She made a total of $63 babysitting yesterday.

Mathematics
2 answers:
Julli [10]3 years ago
8 0

Answer:

She worked for 7 hours.

$9x7=$63

trapecia [35]3 years ago
7 0
Oh well, she babysitted for $63/$9 = $7
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If PQR is a triangle,given that /PQ\=15m, /QR\=17m and /RP\=18m.Find the area of the triangle to the nearest whole number.
nydimaria [60]

Answer:

118.3 m²

Step-by-step explanation:

Step 1. Calculate the <em>semiperimeter</em> (s).

s = (p + q + r)/2

s = (17 + 18+ 15)/2  

s = 50/2

s = 25 m

===============

Step 2. Calculate the <em>area</em> (A).

Use <em>Heron’s formula</em>:

A = \sqrt{s(s-p)(s-q)(s-r)}

A = \sqrt{25(25-17)(25-18)(25-15)}

A = \sqrt{25\times8\times7\times10}

A = \sqrt{14 000}

A = 20\sqrt{35}

A = 118.3 m²

3 0
3 years ago
If the probabilities that an automobile mechanic will service 3, 4, 5, 6, 7, or 8 or more cars on any given workday are, respect
Readme [11.4K]

Answer:

P(X\geq 5)=0.69

Step-by-step explanation:

We need to find the probability that the mechanic will service  or more cars.

It's a simpler one given that we have the probabilities of servicing 4 or less cars.

P(at least 5 cars) is given by subtracting the probabilities of servicing both 3 and 4 cars.

P(X\geq 5)=1-p(x=4)-p(x=3)\\P(X\geq5)=1-0.12-0.19\\P(X\geq5)=1-0.31\\=0.69

5 0
3 years ago
he blood alcohol concentration (BAC) of a 150lb man after 5 drinks is about 0.125. BAC greater than 0.08 will result in a DUI. T
Sonja [21]

Answer:

what is DUI?

Step-by-step explanation:

5 0
4 years ago
Write the slope-intercept form of the equation of the line that is perpendicular to and passes through Point X. Show all work fo
Semmy [17]

Answer:

y =\dfrac{12}{5}x + 22

Step-by-step explanation:

Slope-intercept form of line:

First find the slope of the line AB. ie, m

Slope of the perpendicular line = -1/m

(2 , 3)  ⇒ x₁ = 2 & y₁ = 3  

(-10, 8)  ⇒ x₂ = -10 & y₂ = 8

\boxed{Slope=\dfrac{y_2-y_1}{x_2-x_1}}

          = \dfrac{8-3}{-10-2}\\\\=\dfrac{5}{-12}\\\\=\dfrac{-5}{12}

\sf slope \ of \ the \ perpendicular \ line \ m_1 = \dfrac{-1}{m}= -1 \ \div \dfrac{-5}{12}

                                                   \sf = -1 * \dfrac{12}{-5}=\dfrac{12}{5}

Equation of the required line: y = mx + b

       y =\dfrac{12}{5}x+b

The line passes through (-5 , 10). Substitute in the above equaiton,

         10 =\dfrac{12}{5}*(-5) + b\\\\ 10 = (-12) + b\\\\

 10 + 12 = b

        b   = 22

Equation of the line:

  y =\dfrac{12}{5}x + 22

3 0
3 years ago
5+2f;f=6.1 how do you do it im so confused
liberstina [14]
F is the variable. since f is equal to 6.1 you can plug it into the other equation. you multiply 2 and 6.1. this equals 12.2 then you add two. the final answer is 14.2
7 0
3 years ago
Read 2 more answers
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