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Strike441 [17]
2 years ago
7

Solve x^2 – 3x = –8 using the quadratic formula.

Mathematics
1 answer:
Zina [86]2 years ago
3 0

Answer:

on your scientific calculator click on MODE then number 5 then number 3 and put those numbers x^2 – 3x = –8

(AFTER WRITING EACH NUMBER CLICK ON = SO YOU CAN PUT THE OTHER NUMBERS. FOR EXAMPLE, WRITE 1 AS A THEN CLICK = AND SO ON)

1 and A  (write 1 first then click =)

-3 as B   (write -3 then click =)              

+8 as C  (write 8 then click =)

then you will get the answer of x1 and 2

Step-by-step explanation:

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A professor of statistics wants to test that the average amount of money a typical college student spends per day during spring
STALIN [3.7K]

Answer:

Option c: Fail to reject the null hypothesis at α = 0.10

Step-by-step explanation:

We are given;

Population mean; μ = 70

population standard deviation; σ = 17.32

Sample mean; x¯ = 72.43

Sample size; n = 35

Thus;

Null hypothesis; H0: μ = 70

Alternative hypothesis; Ha: μ > 70

Z-score formula is;

z = (x¯ - μ)/(σ/√n)

z = (72.43 - 70)/(17.32/√35)

z = 2.43/2.9276

z = 0.83

From online p-value from z-score calculator attached, using z = 0.83; significance level = 0.05 and one tailed hypothesis, we have;

P-value ≈ 0.2033

It's more than the significance value, so we will fail to reject the null hypothesis at α = 0.05

Similarly, From online p-value from z-score calculator attached, using z = 0.83; significance level = 0.01 and one tailed hypothesis, we have;

P-value ≈ 0.2033

It's more than the significance value, so we will fail to reject the null hypothesis at α = 0.01

Similarly, From online p-value from z-score calculator attached, using z = 0.83; significance level = 0.10 and one tailed hypothesis, we have;

P-value ≈ 0.2033

It's more than the significance value, so we will fail to reject the null hypothesis at α = 0.10

From the 3 significance values, the correct option is option c. fail to reject the null hypothesis at α = 0.10

5 0
3 years ago
The composite figure is made up of a parallelogram and a rectangle. Find the area.
MAXImum [283]

Answer: A. 76 sq. units


Step-by-step explanation:

1. You can use the following formula for calcualte the area of the parallelogram:

A_p=b_p*h_p

Where b_p is the base and  h_p is the height of the parallelogram

b_p=14units-3units-3units=8units and h_p=6units

2. The formula for calculate the area of a rectangle is:

A_r=b_r*h_r

Where  b_r is the base and  h_r is the height of the rectanngle.

b_r=14units  and h_r=2units  

3. Then, the area of the figure is the sum of the area of the parallelogram and the area of the rectangle:

A_f=(8units*6units)+(14units*2units)=76units^{2}


5 0
3 years ago
Pls helpppppppppppppp
sergey [27]

Answer:

a. √2⁴+3² = √16 + 9

= √25 = 5

The answer is a

b. √10²-2^6 = √100-64

= √36 = 6

The answer is b

Hope this helps.

5 0
3 years ago
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4 0
3 years ago
Someone please answer this question for me I don’t know the answer
zubka84 [21]
Y=4x + 3

Slope is positive 4 (rise/run) and the line intersects point (0,3)
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3 years ago
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