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3 years ago

Can someone plz help me

Mathematics

1 answer:

hammer [34]3 years ago

5 0

Answer: the correct answer is c

Step-by-step explanation: factor using perfect square

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Sheila and Lenore were driving to their grandmother’s house. Lenore left 1 hour after Sheila. Sheila drove at a rate of 45mph, a

solong [7]

Answer:

It'll take 3 h before Lenore catch up to Sheila.

Step-by-step explanation:

To solve this problem we first need to calculate the relative speed between the two. Since they're going at the same direction we need to subtract their individual speeds if their directions were oposite we would have to sum their speeds. In this case we have:

relative speed = Lenore speed - Sheila speed

relative speed = 60 - 45 = 15 mph

Since Sheila left 1 h before Lenore and she drove at a rate of 45 mph, then she had covered a distance of:

distance = time*speed = 1*45 = 45 miles

Before Lenore left, so in order for Lenore to catch up to Sheila she needs to cover that distance at a relative speed of 15 mph.

time = distance/(relative speed) = 45/15 = 3 h

It'll take 3 h before Lenore catch up to Sheila.

4 0

3 years ago

What is the Median for the following set of numbers? â€‹21 23 76 47 55 135 45 30 17

Leno4ka [110]

Answer:

Median = 45

Step-by-step explanation:

We are given the following data set:

21, 23, 76, 47, 55, 135, 45, 30, 17

Median is the number that divides the data into two equal parts.

Formula:

$Median:\\\text{If n is odd, then}\\\\Median = \displaystyle\frac{n+1}{2}th ~term \\\\\text{If n is even, then}\\\\Median = \displaystyle\frac{\frac{n}{2}th~term + (\frac{n}{2}+1)th~term}{2}$

Sorted data:

17, 21, 23, 30, 45, 47, 55, 76, 135

Sample size = 9, which is odd

Median =

$\dfrac{9+1}{2}^{th}\text{ term} = \dfrac{10}{2}^{th}\text{ term} = 5^{th}\text{ term}\\\\= 45$

The median of given set of numbers is 45.

7 0

3 years ago

Please help will give brainliest :)

Black_prince [1.1K]

Answer:

68 is the perimeter

the answer would be 48.17

Step-by-step explanation:

to find the perimeter you have to add all the sides

8 0

3 years ago

-10c + 5 + 12c = -11

givi [52]

Answer:

c = -8

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

First right answer gets brilliant. Can someone please help? It is due today!

nikitadnepr [17]

Answer:

Step-by-step explanation:

A, x=31

E, b=11

N, m=61

Y, b=15

I, a=80

G, k=-78

U, x=-13

R, u=88

O, y=13

A, w=104

H, d=-7

V, n=1/36

Sorry, don't want to give away all the answers!

Hope this helps!!!

7 0

3 years ago