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3 years ago

13

a student gets 11 out of 16 problems correct on a homework assignment. what percent of the assignment did the student get corret

?. thanks if someone answers this

1 answer:

Greeley [361]3 years ago

7 0

Answer:

68.75 Percent

Step-by-step explanation:

11/16 =0.6875

0.6875 into percent is 68.75

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F(x)=-x^2-4x+13 find f(3)

Masja [62]

Answer:

10

Step-by-step explanation:

-(3)^2 - 4(3) + 13

9-12+13

10

5 0

4 years ago

Read 2 more answers

A piece of wire 40 cm long is to be cut into two pieces. One piece will be bent to form a circle and; the other will be bent to

Brums [2.3K]

<h3>The perimeter of circle = 17.6 cm</h3><h3>Perimeter of square = 22.4 cm</h3>

Step-by-step explanation:

The total length of the wire = 40 cm

Let us assume the circumference of the circle = k cm

So, the circumference of the square = ( 40 - k) cm

Now,as circumference of circle = 2πR

⇒2πR = k cm or, R = $(\frac{k}{2\pi})$

Area of the circle = πR²

or, A = $\pi (\frac{k}{2\pi} )^2$

$= \pi \times (\frac{k^2}{(2\pi)^2} ) = \frac{k^2}{4 \pi} \\\implies A = \frac{k^2}{4 \pi}$ ....... (1)

Similarly , perimeter of square = 4 x Side

⇒ 4 x Side = ( 40 - k) cm ⇒ S = $(\frac{40 - k}{4} )$

Area of the square = (Side)² = $(\frac{40 - k}{4} ) ^2$

Solving, we get: $A = \frac{1600 + k^2 - 80 k}{16}$ ....... (1)

So, combining (1) and (2), total area A is

$A = (\frac{k^2}{4 \pi} ) + \frac{k^2 + 1600 - 80 k }{16}$

or, we get: A = 0.07962 k² + 0.0625 k² + 100 - 5 k

A = 0.1422 k² - 5 k + 100

For axis of symmetry : $k = (\frac{-b}{2a} ) = (-\frac{-5}{2(0.1420}) = 17.6$

⇒ k = 17.6 inches

So, the perimeter of circle = 17.6 cm

Perimeter of square = (40 - 17.6 ) = 22.4 cm

3 0

3 years ago

The Martin’s want to buy a new computer. The regular price is $849. The store is offering a 20% discount and a sales tax of 6% i

kramer

Answer: The total cost of computer would be $719.95

Step-by-step explanation:

I use proportions for these types of problems so we begin with a proportion!

20/100=x/849

100x=16980

x=169.80

Then, after finding how much the discount is, we would subtract it.

849-169.80=679.20

Next, we would find the tax amount with another proportion to find what 6 percent of 679.20 is.

6/100=x/679.20

100x=4075.2

x=40.75

Lastly, we would add the tax, $40.75, plus the total after the discount, $679.20!

Hope this helps! Good luck! (:

4 0

3 years ago

Add polynomials (intro)

exis [7]

Hope this helps you:)

7 0

4 years ago

What is the solution to x + 8= -12

Ronch [10]

X + 8 = -12
x = -20, subtract 8 from both sides

5 0

4 years ago