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svet-max [94.6K]
3 years ago
15

Maria sets a goal of jogging 17.5 miles this week she plans on running 2.75 miles each day for seven days if she follows her pla

n which is true more

Mathematics
1 answer:
Anit [1.1K]3 years ago
6 0

Answer:

B

Step-by-step explanation:

So, to figure this out, we must find the total miles Maria ran in a week.

We know that she ran 2.75 miles each day.

She did this for 7 days.

Her goal was 17.5 miles.

So first, multiply the amount of days by the amount of miles per day:

7*2.75

=

19.25

So now we know that she ran a total of 19.25 miles in a week.

Since she onlu needed to run 17.5 miles, we can instantly rule out:

A - Runs less 17.5 miles

C - Runs exactly 17.5 miles

This leaves:

B - She runs 1.75 miles more than 17.5 miles

D - She runs 2.75 miles more than 17.5 miles

To figure out which on is correct, subtract her total miles by her goal:

19.25-17.5

=

1.75

So we know it must be:

B - She runs 1.75 miles more than 17.5 miles

This is because we figured out she ran an extra 1.75 miles.

Hope this helps! :)

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Your chemistry textbook has 936 pages and weighs 4.2 pounds. your calculus textbook has 1368 pages and weighs 6.0 pounds. these
Zarrin [17]
Let the number of chemistry books be x and the number of calculus books be y
total number of books in each case is:
x+y=24
x=24-y.....i

Weight of each case:
2707.2/20
=135.36
thus
4.2x+6.0y=135.36..ii substituting i in ii
4.2(24-y)+6y=135.36
100.8-4.2y+6y=135.36
hence
1.8y=34.56
y=19.2
hence
x=24-19.2
x=4.8
thus the number of chemistry books was 4.8*20=96 number of calculus was
19.2*20
=384 books

4 0
3 years ago
Mrs. Sung gave a test in her trignonmetry class. The scores were normally distributed with a mean of 85 and a standard deviation
lisov135 [29]

Answer and explanation:

67% as it's +/- one standard deviation from the mean

5 0
3 years ago
Oliver took a taxi from his house to the airport. The taxi company charged a pick-up
Pepsi [2]

Answer:

$4.70 + $4.75m = $18.95 which is 3 miles in total.

Step-by-step explanation:

First make the numbers without the variables on one side.

4.75m = 18.95-4.70

Then subtract.

4.75m = 14.25

Finally divide the two numbers.

14.25 ÷ 4.75 = 3 miles

Answer:  m = 3  or 3 miles

3 0
3 years ago
Read 2 more answers
PLEASE HELP! 50 POINTS! Consider the following set of sample data: (34, 32, 34, 32, 40, 37, 31, 31, 29, 27). Which of the follow
Georgia [21]

Answer:

(15.23,41.016)

Step-by-step explanation:

WE must determine the mean of the data set: Which is the sum of the set divided by the number in the set.
= (21 + 24 + 25 + 32 + 35 + 31 + 29 + 28)/8 = 225/8 = 28.125
We must also determine the standard deviation: Which is the square root of the variance and the variance is the sum of squares of the sample number minus the mean divided by the number if the set data:
= ((21 - 28.125)^{2}  + (24 - 28.125)^{2} +(25 - 28.125)^{2}  + (32 - 28.125)^{2} + (35 - 28.125)^{2} + (31 - 28.125)^{2} + (29 - 28.125)^{2} (28 - 28.125)^{2}
= 148.877/8 = 18.6
The 95% confidence interval is defined as: The mean ± 1.96*standard deviation divided by the sqaure root of the number of data in the set:
= 28.125 + (1.96 *18.6)/(\sqrt{8} )
= 41.016
= 28.125 - (1.96 * 18.6)/(\sqrt{8}) = 15.23
The confidence interval for this data set is (15.23,41.016)

5 0
2 years ago
NEED ANSWERS NOW!! (Reward) brainlest and pointsss
ValentinkaMS [17]

Answer:

3072ft

Step-by-step explanation:

we have,

h(t)=-16t²+192t+2560

where

h -----> is the height in feet of the rock

t -----> the time in seconds

For t=8 seconds

substitute the value of t in the function and find the value of h

h(8)=-16(8)²+192(8)+2560

=3072ft

pls mark as brainliest

l need brainliest

3 0
3 years ago
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