3 years ago

Need help with math

Mathematics

1 answer:

podryga [215]3 years ago

4 0

I have no idea math should have been working hade books bye sorry

You might be interested in

Solve x2 − 10x = −13.

aev [14]

Answer:

Step-by-step explanation:

First, let's rearrange the given equation into something more recognizable. If we add 13 to both sides, we now have the polynomial $x^{2}-10x+13$ . We can now use the quadratic formula to solve.

Remember that the quadratic formula is

$\frac{-b+/-\sqrt{b^{2}-4ac } }{2a}$

Substitute the numbers from the equation into the formula.

$\frac{-(-10)+/-\sqrt{(-10)^{2}-4(1)(13) } }{2(1)}$

Simplify:

$\frac{10+/-\sqrt{100-52} }{2}$

$\frac{10+/-\sqrt{48} }{2}$

Here, I'm going to assume that there was a mistype in option B because if we divide out the 2 we end up with $5+/-\sqrt{48}$ .

Hope this helps!

6 0

3 years ago

Given f(x) = 3x^2 + 2x – 1 and g(x) = 4x-5 find ( g of f) (-2)

pishuonlain [190]

Answer:

Step-by-step explanation:

Evaluate f(- 2) then substitute the value obtained into g(x)

f(- 2) = 3(- 2)² + 2(- 2) - 1 = 3(4) - 4 - 1 = 12 - 5 = 7 , then

g(7) = 4(7) - 5 = 28 - 5 = 23

7 0

2 years ago

Read 2 more answers

The equation x^2/121+y^2/1=1 represents an ellipse. Which points are the vertices of the ellipse? (-11,0) and (11,0). (-1,0) and

Fofino [41]

Answer:(-11,0) and (11,0)

6 0

4 years ago

What’s the answer (no link I give brainly)

andreyandreev [35.5K]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Of the last 60 people who went to the cash register at a department store, 13 had blond hair, 18 had black hair, 22 had brown ha

Taya2010 [7]

Yes. 18/60 = 9/30 = 3/10.

5 0

3 years ago