2 years ago

Simplify to create an equivalent expression. 8 -4(-x + 5)

Mathematics

1 answer:

11Alexandr11 [23.1K]2 years ago

4 0

Answer:

4x - 12

Step-by-step explanation:

8 - 4(-x + 5)

8 + 4x - 20

4x - 12

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Fractions less than 1/2

Nat2105 [25]

1/4, 4/10, 3/7 are lower than 1/2

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4 years ago

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Suppose that y varies directly as x and y = -9 when x = 3. find the value of x when y = 18.

Doss [256]

Direct proportionality
y/x=k
-9/3=k
k=-3
so when y=18
18/x=3
cross multiply
3x=18
divide both sides by 3
3x=18
x=6

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4 years ago

The speed limit on a rural road in Europe is 90 km / hr . Yvonne is driving 35 miles How long will it take her if she drives at

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3 years ago

61 random samples of city rent prices are selected from a normally distributed population the samples have a mean of $738 and a

Alenkinab [10]

Answer:

(728, 748)

Step-by-step explanation:

You need the Z value which for 95% confidence interval is 1.96. The mean is $738 and the standard deviation of $41.

$X-Zs/\sqrt{n} \\ X+Zs/\sqrt{n}$

Therefore we can calculated the confidence interval

$738-1.96\cdot{41}/\sqrt{61} =738-10.3$

$738±10.3$

The interval is (728,748)

3 0

3 years ago

The graph below shows the number of visitors at a theme park. How many more visitors in total went to the park in June, July and

Olin [163]

From the information given by the graph

Year 1 visitors
June = 9450
July = 9500
August = 9600

Year 2 visitors
June = 9450
July = 9600
August = 9800

Total visitor Year 1 = 9450 + 9500 + 9600 = 28550
Total visitor Year 2 = 9450 + 9600 + 9800 = 28850

Visitor in Year 2 is 28850-28550 = 300 more than visitor in Year 1

8 0

4 years ago