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anastassius [24]
3 years ago
11

"-8 is 12 less than a number."

Mathematics
1 answer:
stiks02 [169]3 years ago
7 0

Answer:

The answer would be x<4

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Please helppppppppp it a exam question i need help
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Answer:

Step-by-step explanation:

Remember the entire circle has 360 degree. You have everything you need to find angle b.

Your total circle at 360, the measurement 300 and 37.

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A rancher has 300 feet of fencing to enclose a pasture bordered on one side by a river. the river side of the pasture needs no f
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Students in a high school mathematics class decided that their term project would be a study of
weeeeeb [17]

The parameter of interest in this scenario is the proportion of all 1,000 students within the school who have "strict" parents or guardians.

<h3>How to calculate a test statistic?</h3>

In Mathematics, the test statistics of a given sample is calculated by using this formula:

Z=\frac{x\;-\;u}{\frac{\sigma}{\sqrt{n} } }

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  • n is the sample size.

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8 0
2 years ago
A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution. How many of each should be used ?
schepotkina [342]

Answer:

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

Step-by-step explanation:

Let us represent:

The number of liters of 25% acid solution = x

The number of liters of 40% acid solution = y

Our system of Equations =

x + y = 240 liters....... Equation 1

x = 240 - y

A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution.

25% × x + 40% × y = 240 liters × 30%

0.25x+ 0.4y = 72...... Equation 2

We substitute 240 - y for x in Equation 2

0.25(240 - y)+ 0.4y = 72

60 - 0.25y + 0.4y = 72

Collect like terms

- 0.25y + 0.4y = 72 - 60

0.15y = 12

y = 12/0.15

y = 80 Liters

Solving for x

x = 240 - y

x = 240 liters - 80 Liters

x = 160 liters

Therefore,

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

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2 years ago
Mia went to the store with the amount of money shown. Mia used a one-dollar bill and two quarters to buy a bottle of water. How
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Answer:

2.83

Step-by-step explanation:

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