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grandymaker [24]
3 years ago
11

The basketball team scored 89 points in just two- and and three baskets. The number of two points baskets was 27 more than the n

umber of three point baskets. How many two point and three pointers did the team make?
Mathematics
1 answer:
kvv77 [185]3 years ago
3 0

Answer:

The team made 27 two pointers and 7 three pointers.

Step-by-step explanation:

We can solve this question by a system of equations.

I am going to say that:

x is the number of two point baskets.

y is the number of three point baskets.

The team scored 89 points

This means that 2x + 3y = 89

The number of two points baskets was 27 more than the number of three point baskets.

This means that x = 27 + y

So

2x + 3y = 89

2(27 + y) + 3y = 89

54 + 2y + 3y = 89

5y = 35

y = \frac{35}{5}

y = 7

x = 27 + y = 27 + 7 = 34

The team made 27 two pointers and 7 three pointers.

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3 years ago
A machine, when working properly, produces 5% or less defective items. Whenever the machine produces significantly greater than
vovikov84 [41]

Answer:

The pvalue of the test is 0.0007 < 0.01, which means that we reject the null hypothesis and accept the alternate hypothesis that the percentage of defective items produced by this machine is greater than 5%.

Step-by-step explanation:

A machine, when working properly, produces 5% or less defective items.

This means that the null hypothesis is:

H_0: p \leq 0.05

Test if the percentage of defective items produced by this machine is greater than 5%.

This means that the alternate hypothesis is:

H_a: p > 0.05

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.05 is tested at the null hypothesis:

This means that \mu = 0.05, \sigma = \sqrt{0.05*0.95}

A random sample of 300 items taken from the production line contained 27 defective items.

This means that n = 300, X = \frac{27}{300} = 0.09

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.09 - 0.05}{\frac{\sqrt{0.05*0.95}}{\sqrt{300}}}

z = 3.18

Pvalue of the test:

Testing if the mean is greater than a value, which means that the pvalue of the test is 1 subtracted by the pvalue of Z = 3.18, which is the probability of a finding a sample proportion of 0.09 or higher.

Looking at the Z-table, Z = 3.18 has a pvalue of 0.9993

1 - 0.9993 = 0.0007

The pvalue of the test is 0.0007 < 0.01, which means that we reject the null hypothesis and accept the alternate hypothesis that the percentage of defective items produced by this machine is greater than 5%.

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3 years ago
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Lana71 [14]
<span>25w² + 60w + 36
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Leona [35]

Step-by-step explanation:

Not entirely sure, but I believe something like this:

∠1 + ∠2 = 180° since they are a linear pair;

Since ∠1  = ∠2, we can say:

∠1 + ∠1 = 180°

2(∠1) = 180°

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And since:

∠1 = ∠2

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8 0
2 years ago
The prices of two ratios are in the ratio x:y
Archy [21]

Answer:

4:1

Step-by-step explanation:

x+20 : y+20 = 5 : 2

(x+20)/(y+20) = 5/2

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(x-5)/(y-5) = 5/1

x-5 = 5(y-5)

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Solve (1) & (2) simultaneously,

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x = 5y-20

x = 5(20)-20 = 100-20

x = 80

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80:20

4:1

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