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Salsk061 [2.6K]
3 years ago
8

X- 14x + 40

Mathematics
2 answers:
ivanzaharov [21]3 years ago
6 0

Answer: b. (x−4)(x−10)

Step-by-step explanation:

Let's factor x^2−14x+40

x^2−14x+40

The middle number is -14 and the last number is 40.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get -14

Multiply together to get 40

Can you think of the two numbers?

Try -4 and -10:

-4+-10 = -14

-4*-10 = 40

Fill in the blanks in

(x+_)(x+_)

with -4 and -10 to get...

(x-4)(x-10)

Answer:

(x−4)(x−10)

Vinil7 [7]3 years ago
5 0
The answer is : B. (X-10)(x-4)
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A. What would be the cost of the Standard Daily Rate plus Mileage plan?
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Answer:

Part a) \$190

Part b) \$315

Part c) Standard Daily Rate plus Mileage plan

Step-by-step explanation:

Part a) What would be the cost of the Standard Daily Rate plus Mileage plan?

Let

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we have that

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y=70+0.30x

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The trip are three days

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To find the total cost multiply $105 by 3

3(\$105)=\$315

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\$190 < \$315

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7 0
3 years ago
What is 2.50x + 4x = 39
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2.5x + 4x = 39
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Use the standard norml distribution or the t-distribution to construct a 99% confidence interval for the population mean. Justif
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Answer:

E) we will use t- distribution because is un-known,n<30

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Step-by-step explanation:

<u>Step:-1</u>

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The mean interest rate 'x' = 0.0365

The standard deviation 'S' = 0.0046

the degree of freedom = n-1 = 23-1=22

99% of confidence intervals t_{0.01} =2.82  (from tabulated value).

The mean value = 0.0365

x±t_{0.01} \frac{S}{\sqrt{n-1} }

0.0365±2.82 \frac{0.0046}{\sqrt{23-1} }

0.0365±2.82 \frac{0.0046}{\sqrt{22} }

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using calculator

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<u>Answer:-</u>

<u>using t- distribution because is unknown,n<30,and the interest rates are not normally distributed.</u>

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