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2 years ago

A student correctly answered 35 of the 40 questions on a mathematics exam. What percent did she answer correctly?

Mathematics

1 answer:

GrogVix [38]2 years ago

7 0

Answer:

87.5%

Step-by-step explanation:

To find a percentage of questions correct divide the number of correct answers by the total number of questions and then multiply that by 100.

(35/40)100=87.5

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15 one half subtracted by 3 wholes and seventh eights

FromTheMoon [43]

15 and one half is 31/2. 3 and seven eighths is 31/8. 31/2 also equals 124/8. Then the answer is 124/8 - 31/8 is 91/8. Hope that helped.

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3 years ago

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Can you add a negative and positive fraction or do you have to subtract it?

KengaRu [80]

Answer:

Step-by-step explanation:

You have to subtract it because you add a negative and positive fraction together you can add a positive with a positive or vice versa but you can add n and p together so you have to subtract.

Hope it helps

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3 years ago

Divide. Write the quotient in lowest terms. - 18/7 * 3

RideAnS [48]

Answer:

-7.7

Step-by-step explanation:

-18 divided by 7 = -2.57

-2.57 multiplied by 3 = -7.7

-7.7

I used simplistic form for this equation as the numbers where quite long.

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4 years ago

What’s the correct answer for this?

kkurt [141]

Answer:

Step-by-step explanation:

In the attached file

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4 years ago

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What is the coordinate of point P that lies along the directed line segment from Q(2, 5) to R(7, 12) and partitions the segment

Radda [10]

Answer:

(C)(5,9.2)

Step-by-step explanation:

Given points Q(2, 5) and R(7, 12). We are to determine the coordinate of point P that lies along the directed line segment which partitions the segment in the ratio of 3 to 2.

For internal division of a line segment, the coordinate of the point which partitions the segment in the ratio m:n is given as:

$\left(\dfrac{mx_2+nx_1}{m+n} , \dfrac{my_2+ny_1}{m+n}\right)$

m:n =3:2

$(x_1,y_1)=Q(2,5)\\(x_2,y_2)=R(7,12)$

Therefore:

$P(x,y)=\left(\dfrac{3*7+2*2}{3+2} , \dfrac{3*12+2*5}{3+2}\right)\\=\left(\dfrac{25}{5} , \dfrac{46}{5}\right)\\P(x,y)=(5,9.2)$

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4 years ago