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1 year ago

Question 2 of 10

Mathematics

1 answer:

Anni [7]1 year ago

5 0

Answer:

47/100 and 47%

Step-by-step explanation:

He missed 53 out of 100 so that means he made 47 out of a 100 and there you go... 47/100 and 47%

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an electrition charged $70 for 2 hours of work and 115 for 5hours of work write an equtionto find the cost for y and xk

Westkost [7]

$\bf \begin{array}{ccll} \stackrel{x}{hours}&\stackrel{y}{cost}\\ \cline{1-2} 2&70\\ 5&115 \end{array}~\hspace{10em}(\stackrel{x_1}{2}~,~\stackrel{y_1}{70})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{115}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{115-70}{5-2}\implies \cfrac{45}{3}\implies 15$

$\bf \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-70=15(x-2)\implies y-70=15x-30 \\\\\\ y=15x+40\impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}$

as you already know, a direct proportional variation has a constant of variation "k", y = kx, which in this case that'd be the slope, namely 15.

7 0

2 years ago

Solve the equation.<br> 9x=25

lidiya [134]

Answer:

$x = \frac{25}{9}$

Step-by-step explanation:

Divide both sides by 9 to isolate x:

$\frac{9x}{9} = \frac{25}{9} \\x = \frac{25}{9}\\$

Hope this helps!

8 0

2 years ago

PLEASE HELP!!! IS Anyone good with probability ???!!!!!

Arada [10]

A) 1/3 B) 2/3 C) what is it asking D) 1/3 E1/3

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2 years ago

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A force of 200 Newtons is applied to a machine to lift a 1,000 Newtons load. What is the MA of the machine?

vovikov84 [41]

Answer:

Step-by-step explanation:

The mechanical advantage of a machine is the ratio of the force that you need to input to how much is outputted. 200:1000=1:5, meaning that the mechanical advantage is 5. Hope this helps!

3 0

2 years ago

Imagine that you are outside one sunny day and are standing 10 feet away from a tree that is 8 feet tall. Which function correct

kifflom [539]

Answer:

tan -1 (8/10)

Step-by-step explanation:

hope it helps :3

7 0

3 years ago