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3 years ago

321.5 miles in 5 hours

Mathematics

1 answer:

Nutka1998 [239]3 years ago

5 0

Answer:

i think its 64.3

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I need help!!! how do i do this

dimulka [17.4K]

Answer:

what is it ?? im glad to help but there was on picture uploaded

Step-by-step explanation:

5 0

2 years ago

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Curtis decided to go on a road trip to Canada. On the first day of his trip, he drove for 10 hours and traveled 660 miles. At wh

Inga [223]

Answer:

Step-by-step explanation

This is very simple, 660/10

4 0

4 years ago

Linda Murray's investment earned $77.00 in simple interest in 6 months at an annua

Greeley [361]

Answer:

$\$2,200$

Step-by-step explanation:

we know that

The simple interest formula is equal to

$I=P(rt)$

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=6/12=0.5\ years\\ P=?\\ I=\$77.00\\r=7\%=7/100=0.07$

substitute in the formula above

$77.00=P(0.07*0.5)$

solve for P

$77.00=0.035P$

$P=77.00/0.035$

$P=\$2,200$

3 0

4 years ago

Find the equation of the tangent of x^2- xy + y^2 =7 at (-1, 2)

Citrus2011 [14]

Answer:

It is 3y = 4x + 10

Step-by-step explanation:

Let's first get the slope of the curve.

[ slope is the derivative of the equation ]

${x}^{2} - xy + {y}^{2} = 7$

introduce dy/dx :

$\frac{d}{dx} ( {x}^{2} - xy + {y}^{2} ) = \frac{d}{dx} (7) \\ \\ 2x - (y + \frac{dy}{dx} ) + 2y \frac{dy}{dx} = 0$

make dy/dx the subject:

$2x - y - \frac{dy}{dx} + 2y \frac{dy}{dx} = 0 \\ \\ 2y \frac{dy}{dx} - \frac{dy}{dx} = y - 2x \\ \\ \frac{dy}{dx} (2y - 1) = y - 2x \\ \\ \frac{dy}{dx} = \frac{y - 2x}{2y - 1}$

At point (-1, 2):

$\frac{dy}{dx} = \frac{2 - 2( - 1)}{2(2) - 1} \\ \\ slope = \frac{4}{3}$

but a tangent has the same slope as the curve:

$y = mx + c$

m is the slope

c is the y-intercept

At (-1, 2):

$2 = ( - 1 \times \frac{4}{3} ) + c \\ \\ c = 2 + \frac{4}{3} \\ \\ c = \frac{10}{3}$

equation:

$y = \frac{4}{3} x + \frac{10}{3} \\ \\ { \boxed{3y = 4x + 10}}$

8 0

3 years ago

Read 2 more answers

For exercise, mr.harris walked 1 and 3 fourths miles 5 times last week.how many miles did he walk in all?

RUDIKE [14]

Well, if he walked one and three fourths miles five times, all you have to do is multiply one and three fourths and five to get your answer.

$1 \frac{3}{4}*5 \\ \\ \frac{7}{4}* \frac{5}{1} \\ \\ \frac{7*5}{4*1} \\ \\ \frac{35}{4} =8 \frac{3}{4}$

4 0

4 years ago

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