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3 years ago

Solve the following system using any method you choose:

Mathematics

2 answers:

ahrayia [7]3 years ago

5 0

Answer:

(4,2)

Step-by-step explanation:

(4)-4(2)=-4

5(4)-4(2)=12

krok68 [10]3 years ago

4 0

ANSWER: (4,2) it satisfies both equations

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The average annual rainfall in California is 0.564 of a meter per year. What is the value of the digit 4 in that number

dolphi86 [110]

Four one-thousandths.

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3 years ago

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Tareq pays $22.10 for 2.6 pounds of salmon. what is the price per pound of the salmon?

Juliette [100K]

What i would do since $22.10 for 2.6 find out how much 1 pound of salmon is

so divide $22.10 by 2.6

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2 years ago

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A random sample of 121 students from the University of Oklahoma had a sample mean ACT score of 23.4 with a sample standard devia

Grace [21]

Answer:

(22.74,24.06) is the required 95% confidence interval for the population mean ACT score of University of Oklahoma students.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 121

Sample mean = 23.4

Sample standard deviation = 3.65

Level of significance = 0.05

Degree of freedom

$= n - 1 = 120$

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Calculation of critical value:

$t_{critical}\text{ at degree of freedom 120 and}~\alpha_{0.05} = \pm 1.9799$

Putting the values, we get,

$23.4\pm 1.9799(\dfrac{3.65}{\sqrt{121}} )\\\\ = 23.4 \pm 0.6569\\\\ = (22.7431 ,24.0569)\approx (22.74,24.06)$

(22.74,24.06) is the required 95% confidence interval for the population mean ACT score of University of Oklahoma students.

5 0

3 years ago

Find the amount of social security deducted from the check: $835 biweekly.

Inga [223]

Normally 8% is deducted as social security tax.

So,
8% of 835 = 8/100 x 835
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4 0

2 years ago

Please help i have been trying to figure this out for like an hour

KengaRu [80]

Answer:

Step-by-step explanation:

Since x varies directly as y, the ratio of x to y remains the same. Let the value of x when y=4 be a. Then we have

$\dfrac {7 \frac12} {10} = \dfrac a4$

We can cross multiply to get that

$10a = 30, \text{so } \boxed{a=3}$

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3 years ago