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lesya [120]
3 years ago
9

Which expression is a factor of x^2 + 2x – 15?​

Mathematics
1 answer:
Ksju [112]3 years ago
7 0
To factor this you need values that add up to 2 and multiply to -15

So you get 5,-3 then you put it into your equation for you b value

X^2+5x-3x-15

Then you can factor by grouping

X(x+5)-3(x+5)

So your factors are

(X+5)(x-3)
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What equation can be used to find the length of AC
slavikrds [6]
ANSWER

(10)sin(40 \degree) = AC


EXPLANATION

The given triangle ABC is a right angle triangle.

Side AC of ∆ABC is opposite to the known angle which is
40 \degree

The hypotenuse of the right angle triangle ABC is 10 in.




We use the sine ratio to arrive at the required equation.


Recall that, the sine ratio is given by
\sin( \theta)  =  \frac{length \: of \: opposite \: side}{length \: of \: the \: hypotenuse}



This implies that,


\sin(40 \degree)  =  \frac{AC}{10}


We now make AC the subject to obtain,


AC = (10) \sin(40 \degree)



The correct answer is A.
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4 years ago
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aleksley [76]
The slope of a line characterizes the direction of a line.
3 0
2 years ago
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A factory made 200,000 socks, 50,000 shirts, and 900 pairs of pants last year. This year, they made 40,000 more socks and 3,000
Vesnalui [34]

Answer:

Step-by-step explanation:

Socks: 200000 + 40000 = 240000

Shirts:                                     50000   Must have stayed the same.

Pants: 900 + 3000         <u>         3900   </u> Pants

Total                                      293900

4 0
3 years ago
You measure 40 watermelons' weights, and find they have a mean weight of 67 ounces. Assume the population standard deviation is
kondor19780726 [428]

Answer:

35.36,44.64

Step-by-step explanation:

Sample size n=40

Mean weight \=x =67

Standard deviation \sigma=11.4

Confidence Interval CI=0.99

\alpha==0.01

Therefore

Z_{\frac{\alpha}{2}}=Z_[0.005]

From table

Z_{\frac{\alpha}{2}}=2.576

Generally, the equation for Margin of error is mathematically given by

M.E=Z_{\frac{\alpha}{2}}*(\frac{\sigma}{sqrt{n}}

M.E=2.576*(\frac{11.4}{\sqrt{40}}

M.E=4.64

Therefore Estimated mean is

\=x-M.E

40-4.64

35.36

35.36,44.64

7 0
3 years ago
four ball of wool will make 8 knitted caps how many ball of wool will Malcolm need if he wants to make 6 caps
Pachacha [2.7K]
3 balls, each ball is going by 2s
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