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liq [111]
4 years ago
13

Please help. This test is very important.

Mathematics
1 answer:
kolezko [41]4 years ago
4 0
<span>1. (−2/3) (16)
Enter your answer as a fraction, in simplified form.

answer: -32/3

2. What is the product of −2 1/2 and −3 1/3 ?
answer: 25/3

3. Divide.

−24/7
answer: -3 3/7

Enter your answer as a mixed number, in simplified form.

</span><span>4. A running cheetah begins to slow down. For each meter the cheetah travels, its speed changes by −3.4−3.4 kilometers per hour. The cheetah travels a total of 21.5 meters.

What is the total change in the cheetah's speed during this time?
A. 73.1 
B. 71.9
C. -71.9

answer: D. -73.1

5. Multiply.

(−0.64) (−2.5) 

answer: 1.6

Enter your answer as a decimal.

</span><span>6. Christopher recorded the low temperature each day for 1 week and recorded his results in this table.

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Low −5 °F ​ −8 ​°F ​ −6 ​°F ​ −8 ​°F ​ −3 ​°F 2° F 7° F
What is the average low temperature for the week?
answer: -3

7.Divide.

5/6÷−2/3
answer: -5/4 or - 1 1/4 (mixed #) or -1.25 (decimal)

8. Jerry measured and timed the descent of a diving bell spider in a large fish tank. The spider reached a position 4 1/2 inches below the surface of the water after descending at a constant rate for 1 1/2 seconds. Jerry recorded this as −4 1/2 inches.

What is the position of the spider relative to the surface after 1 second?
answer: </span>-3

<span>9. Divide.

(3 3/4) ÷ (−2 1/2)

Enter your answer as a mixed number, in simplified form.
answer: -1 1/2

10. Miko’s restaurant bill was $16. She used the expression 1.18(16) to find the total cost including an 18% tip.

Which expression is equivalent to the amount Miko paid?
</span>
<span>answer: 16 + 0.18(16)</span>
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What is the equation of the line that is parallel to the line y =1/3 x + 4 and passes through the point (6, 5)?
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Answer:

y = \frac{1}{3} x + 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = \frac{1}{3} x + 4 ← is in slope- intercept form

with slope m = \frac{1}{3}

Parallel lines have equal slopes , then

y = \frac{1}{3} x + c ← is the partial equation

To find c substitute (6, 5) into the partial equation

5 = 2 + c ⇒ c = 5 - 2 = 3

y = \frac{1}{3} x + 3 ← equation of parallel line

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Find all angles and pls show steps ​
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Answer:

Both angles have a measure of 134degrees, y = 27degrees.

Step-by-step explanation:

As per what is given in the problem:

There are 2 parallel lines, both are intersected by a transversal.

Remember the theorem, when two parallel lines are intersected by a transversal, then the alternate exterior angles are congruent.

The is meanse that:

3y + 53 = 7y - 55

Solve using inverse operations:

3y + 53 = 7y - 55

     +55         +55

3y + 108 = 7y

-3y            -3y

108 = 4y

/4      /4

27 = y

Now, substitute back in to find the value of the angle:

3y + 53

y = 27

3 ( 27 ) + 53

81 + 53

= 134

Since the angles are alternate exterior, they are congruent, hence both angles have a measure of 134degrees.

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How much does the cost increase for each ton of sugar being transported?
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A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were r
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Answer: A.

H_0:p=0.12\\\\H_a:p

Step-by-step explanation:

Null hypothesis(H_0) : A statement describing population parameters as per the objective of the study. It usually takes "≤,≥,=" signs.  

Alternative hypothesis (H_a): A statement describing population parameters as per the objective of the study. It usually takes ">, <, ≠" signs.

Let p be the proportion of screens that will be rejected.

12 percent of the screens manufactured using a previous process were rejected at the final inspection.

(i.e. p= 0.12)

Objective of the study = whether the new process<em> reduces </em>the population proportion of screens that will be rejected

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So, the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected:

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