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Natasha2012 [34]
3 years ago
6

Last year a student correctly answered 4/5 of the total 40 questions given.What percent of the total questions she correctly ans

wered?
Mathematics
1 answer:
Rzqust [24]3 years ago
4 0
She got 80 percent of the questions right
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How do you divide a fraction
mariarad [96]
"Dividing<span> by </span>fractions<span> is just like multiplying </span>fractions<span>, except for one additional step. To </span>divide<span> any number by a </span>fraction<span>: First step: Find the reciprocal of the </span>fraction<span>. Second step: Multiply the number by the reciprocal of the </span>fraction<span>." -Google</span>
7 0
3 years ago
Read 2 more answers
Consider the quadratic function.
Genrish500 [490]
Mark Brainliest please

Answer :

a = 1, b = -8, c = -5

Explanation

A standard form for the quadratic function is f(x) = ax2 + bx + c where the coefficients are a, b, and c.
The given quadratic function is f(p) = P2 - 8P - 5 When this function is compared to the standard form, with p replacing x, we obtain a = 1 because the leading term is 1*p2, b = -8 because the linear term is -8*p, c = -5 because the constant term is -5.
Answer is : a = 1, b = -8, c = -5.
6 0
3 years ago
Jeff takes 5 hour longer to build a fence than it takes bill. when they work together, it takes them 6 hours. how long would it
kobusy [5.1K]
Best Answer: Bill's time to do the whole job, B
Jeff's time, B + 5
time they actually work, 6.

6/B + 6/(B+5) = 1
6(B+5) + 6B = B(B+5)
6B + 30 + 6B = B² + 5B
B² - 7B - 30 = 0
(B - 10)(B + 3) = 0
B = 10 or B = -3, and we reject the negative solution.

the equation is based on adding the fractions of the whole job each does. if Bill takes B hours to do the whole thing and works 6, he does 6/B of the job. similarly for Jeff.

in the 2nd problem,
a = time of experienced accountant
2a = time of new accountant
10 = time each actually works

10/a + 10/(2a) = 1 ........ multiply all by a
10 + 5 = a
a = 15 hr.
7 0
3 years ago
Figure ABCD is graphed on a coordinate plane.
Phoenix [80]
1. BC is 1+3=4 (units)

2. AD is 3+5= 8 (units)

3. Draw the altitude CH from point C, as shown in the figure.

4. Then triangle CHD is a right triangle, with hypothenuse CD, and sides HD and CH.

5. CD^2=HD^2+CH^2

CD^2=2^2+4^2=4+16=20

CD= \sqrt{20}= \sqrt{4*5}= \sqrt{4} *  \sqrt{5}=2 \sqrt{5}= 4.47

6. AB=CD=4.47 because the trapezoid is isosceles.

7. P= BC+AD+AB+CD=4+8+4.47+4.47=20.9 (units)

3 0
4 years ago
Read 2 more answers
And a picture of a charger just because
REY [17]

Answer:

1. 1

2. 5

3. lost 0.8 pounds

Step-by-step explanation:

The least value (or the most she lost) is in week 1

The greatest value (or the most she gained) is in week 5

When you add all the values together, you get:

-4.1 (lost)

3.3 (gained)

3.3 - 4.1 = -0.8

She lost a total of 0.8 pounds

These are your answers

Hope this helps!

5 0
3 years ago
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