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3 years ago

Lanette drove 248 miles in 4 hours. At the rate, how many hours will it take her to drive a additional 93miles.

Mathematics

1 answer:

LenaWriter [7]3 years ago

7 0

Answer:

1.5 hours

Step-by-step explanation:

using the relationship between distance/ speed / time

distance = speed × time

speed = $\frac{distance}{time}$ = $\frac{248}{4}$ = 62 mph

travelling at this rate then

time = $\frac{distance}{speed}$ = $\frac{93}{62}$ = 1.5 hours

You might be interested in

Nia's bag weighs 5-sixths of the maximum weight allowed for bags on an airplane. The maximum weight allowed is 45 pounds. What i

scZoUnD [109]

Answer:

Step-by-step explanation:

copy dot flip 45/1 divided by 5/6

first copy dot flip so 45/1 then multiply and flip 5/6 so it looks like this

45/1 x 6/5= 270/5 then you need to see how many time 5 goes in 270 which is 54 and thats you anwser hope this helps sorry if im wrong

4 0

3 years ago

Dan's dog walking job pays $15 per hour his job as a car wash attendant pays $400 each week Dan wants to know how many hours he

Sergio [31]

Answer:

520<400+15x

15x>120

15x+400>520

Explanation:

Pay of Dan's car wash attendant job =$400 per week

The amount he earns per hour walking dogs = $15

Let the number of hours spent walking dogs in a week = x

Therefore, total earning for walking dogs =$15x

Since he wants to earn more than $520, we have that:

$15x+400>520\text{ (Option F)}$

We can rewrite this as:

$520$

If we collect like terms, we have:

$\begin{gathered} 520-400$

So the inequalities are:

0. 520<400+15x

1. 15x>120

2. 15x+400>520

5 0

1 year ago

Please help! .........

stira [4]

Answer:

1) When x is 1, y is 4, and vice versa

2) When x is -6, y is 42, and when x is 7, y is 114

3) When x is -2, y is 2, and when x is 8, y is 42

Step-by-step explanation:

$y=x^2-6x+9$

$y+x=5$ which can be rearranged as $y=5-x$ .

Substituting this lone y into the first equation, you get:

$5-x=x^2-6x+9$

Move everything to one side:

$x^2-5x+4=0$

Factor:

$(x-4)(x-1)=0$

$x=1, 4$

$y=4, 1$

$y-30=12x$ which can be rearranged as $y=12x+30$ .

$y=x^2+11x-12$

Let's use elimination this time and subtract the first equation from the second:

$0=x^2-x-42$

Factor:

$(x-7)(x+6)=0$

$x=-6, 7$

$y= -42, 114$

$y=x^2-2x+6$

$y=4x+10$

Let's set the two equations equal to each other through substitution:

$x^2-2x-6=4x+10$

Move everything to one side:

$x^2-6x-16=0$

Factor:

$(x-8)(x+2)=0$

$x=-2, 8$

$y= 2, 42$

Hope this helps!

6 0

3 years ago

In an all boys school, the heights of the student body are normally distributed with a mean of 71 inches and a standard deviatio

muminat

Answer:

15.87%

Step-by-step explanation:

First thing here is that we calculate the z-score which corresponds to 76

mathematically;

z-score = (x-mean)/SD

mean = 71 and SD = 5

plugging these values, we have;

z = (76-71)/5 = 5/5 = 1

Now, we want to firstly get the probability that we have a student shorter than 76 inches

The probability we want to calculate is P(z<1)

we can get this using the z-score table directly

That would be 0.15866

In percentage that is 15.866% which is 15.87% to the nearest tenth

7 0

3 years ago

All changes

inn [45]

Answer:

Step-by-step explanation:

Volume= (4/3)*pi*r^3

40007= (4/3)*pi*r^3

r=21m

7 0

3 years ago