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3 years ago

please give me the steps to solve this, will mark brainlyest if leads to correct answer

Mathematics

1 answer:

ZanzabumX [31]3 years ago

3 0

Answer: The car will skid 200 miles

Step-by-step explanation:

The formula S= 7/2√2D

can be used to approximate the speed S, in miles per hour, of a car that has left skid marks of length D, in feet. To determine how far a car will skid at 70 mph, we will substitute 70 mph for S in the formula. It becomes

70 = 7/2√2D

We will take squares of both sides. This is to simplify the square root on the right had side of the equation. It becomes

70^2 = 7^2/2^2(√2D)^2

4900 = 49/4 × 2D

4900 = 49D/2

Cross multiplying,

49D = 2 × 4900 = 9800

D = 9800/49 = 200

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3 years ago

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3 years ago

Select the equation that represents the problem. Let × represent the unknown number.

kondor19780726 [428]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

PLEASE HELPPPPPJohn and Kathy are shopping for their first home. Between the two of them, they feel they can afford a $1400 mont

xxTIMURxx [149]

Answer: $249,300

Step-by-step explanation:

The exact formula would be if I think this is right

PV = PMT(1-(1+r)^-n)/r with r & n adjusted for periodicity

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= $249,318.47

which you can round off to, say, $249,300 <------

note:

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3 years ago

what is the slope-intercept form for a line that has a slope of -4/5 and passes through points (0,7)?

drek231 [11]

$\bf (\stackrel{x_1}{0}~,~\stackrel{y_1}{7})~\hspace{10em} slope = m\implies -\cfrac{4}{5} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-7=-\cfrac{4}{5}(x-0) \\\\\\ y-7=-\cfrac{4}{5}x\implies y=-\cfrac{4}{5}x+7$

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3 years ago

**please give me the steps to solve this, will mark brainlyest if leads to correct answer**

please give me the steps to solve this, will mark brainlyest if leads to correct answer