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faust18 [17]
2 years ago
9

I still need help! Please! Help me

Mathematics
1 answer:
Svetach [21]2 years ago
6 0

Part A = 60

Part B is C

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Solve x2 − 10x = −13.
aev [14]

Answer:

B

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
2 years ago
Find two numbers if their ratio is 4:7 and their difference is 123.
belka [17]

Answer:

The two numbers are -164 and -287

They could also be 164 and 287

Step-by-step explanation:

The ratio of 2 numbers 4/7  

x/y = 4/7

Using cross products

7x =4y

Their difference is 123

x-y = 123

x = 123+y

Substituting in

7(123+y) =4y

Distribute

861 +7y = 4y

Subtract 7y from each side

861 +7y-7y = 4y-7y

861 = -3y

Divide each side by -3

861/-3 = -3y/-3

-287 = y

Now we need to find x

x = 123+y

x = 123+ -287

x = -164


The numbers could also be 164 and 287

The difference is 287-164 = 123

And the ratio is 164/287 = 4/7

4 0
3 years ago
Read 2 more answers
Use the graph below to find the equation that it represents.
hoa [83]

Answer:

looking at the image it forms

the equation it'll make B: y= -2x -4

each dot will equal -2 and the dot is maybe one 2 but thats due to the problem of 4-2x1 so it's marked on 2 instead of four incase it throw you off of thy answer of B

4 0
2 years ago
Please help meeeeee!!!!
ser-zykov [4K]
I think the answer is B y= 3x-7
8 0
2 years ago
Read 2 more answers
Which of the following is the additive inverse of 1/2
shtirl [24]

Answer:

There is no additive inverse only a multiplication because 1/2 is division so you have to do multiplication. But the answer to that is 2.

8 0
3 years ago
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