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2 years ago

20 = n − 4, what is n?

Mathematics

1 answer:

Dovator [93]2 years ago

3 0

Answer:

N = 24

Step-by-step explanation:

24 - 4 = 20

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Pls find x will give brainliest

nasty-shy [4]

Answer:

Step-by-step explanation:

they are the same triangle look at corresponding sides. 9+9=18

3 0

4 years ago

Given that fx=2x2-4x+1, then f(-1)is.

oksian1 [2.3K]

Answer:

$f(-1)=7$

Step-by-step explanation:

I am going to assume your question meant the equation

$f(x)=2x^{2} -4x+1$

So $f(-1)$ can be found by substituting all the x terms in the equation with -1

$f(-1)=2(-1)^{2} -4(-1)+1$

And simplifying for our answer

$f(-1)=2(1)+4+1$

$f(-1) = 2+4+1$

$f(-1)=7$

5 0

3 years ago

The math club sells candy bars and drinks during football games.

Vinvika [58]

Answer:

The price of candy bar is 75 cents

Step-by-step explanation:

Let c be the price of candy bar and d be the price of drinks

Then according to given statements

$60c+110d = 265\ \ \ \ Eqn\ 1\\120c+90d = 270\ \ \ \ Eqn\ 2$

Multiplying equation 1 by 2

$120c+220d = 530\ \ \ \ Eqn\ 3$

Subtracting equation 2 from equation 3

$120c+220d - (120c+90d) = 530 - 270\\120c+220d-120-90d = 260\\130d=260$

Dividing both sides by 130

$\frac{130d}{130} = \frac{260}{130}\\d = 2$

Putting d=2 in equation 1

$60c+110(2) = 265\\60c + 220 = 265\\60c+220-220 = 265-220\\60c=45\\c = \frac{45}{60}\\c = 0.75$

Price of candy bar is $0.75 or 75 cents

Hence,

The price of candy bar is 75 cents

5 0

4 years ago

Which relation is also a function?

Lelu [443]

Answer:

D because if you graphed the others they wouldn't pass the vertical line test

5 0

3 years ago

Read 2 more answers

Find the solution x-2y=-26 x-y=-2

zalisa [80]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}x-2y=-26\\x-y=-2&\text{change the signs}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}x-2y=-26\\-x+y=2\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad-y=-24\qquad\text{change the signs}\\.\qquad\qquad y=24\\\\\text{Put the value of y to the second equation:}\\\\x-24=-2\qquad\text{add 24 to both sides}\\x=22$

3 0

3 years ago