Ask question

Ask question

All categories

2 years ago

15

Diana got back her math quiz but Ms. Signer forgot to calculate her final grade. If the quiz had a total of 20 questions on it,

and Diana got four wrong, what was her final grade (written as a percentage)?

1 answer:

svet-max [94.6K]2 years ago

5 0

Answer:

She made a final grade of 80% or you could say she got 20% of the questions wrong.

You might be interested in

How many liters of a 90% acid solution must be added to 6 liters of a 15% acid solution to obtain a 40% acid solution?

tatiyna

3 liters must be added

4 0

3 years ago

What 2 fun facts did you learn about the inauguration

bekas [8.4K]

1-there were a huge amount of firsts yesterday
2-first ever inauguration the ex president didn’t go

8 0

2 years ago

Maslowich

Answer: x = -2

<u>Step-by-step explanation:</u>

vertical line means it will be x = ___

Set the x-values equal to each other and solve for x.

3 - 2x = x + 9

<u> +2x</u> <u>+2x </u>

3 = 3x + 9

<u>-9 </u> <u> -9 </u>

-6 =3x

$\frac{-6}{3} = \frac{3x}{3}$

-2 = x

4 0

3 years ago

Read 2 more answers

How do u factor this

PilotLPTM [1.2K]

You can factor a parabola by finding its roots: if

$p(x)=x^2+bx+c$

has roots $x_1,\ x_2$ , then you have the following factorization:

$p(x) = (x-x_1)(x-x_2)$

In order to find the roots, you can use the usual formula

$x_{1,2} = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

In the first example, this formula leads to

$x_{1,2} = \dfrac{-2\pm\sqrt{4+4}}{2} = \dfrac{-2\pm\sqrt{8}}{2} = \dfrac{-2\pm2\sqrt{2}}{2} = 1 \pm \sqrt{2}$

So, you can factor

$x^2-2x-1 = (x-1-\sqrt{2})(x-1+\sqrt{2})$

The same goes for the second parabola.

As for the third exercise, simply plug the values asking

$f(1.5)=-5.25$

you get

$f(-1.5) = 1.5c-3 = -5.25$

Add 3 to both sides:

$1.5c = -2.25$

Divide both sides by 1.5:

$c = 1.5$

7 0

3 years ago

The smallest minor arc is?

natulia [17]

Answer:

$\widehat {ADF}$

Step-by-step explanation:

$\widehat {ADF}$ is the smallest minor arc.

6 0

3 years ago