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3 years ago

3x-2x=6-7 solve this problem step by step

Mathematics

2 answers:

elena-s [515]3 years ago

5 0

Answer:

-1

Step-by-step explanation:

1x= -1

x= -1

PIT_PIT [208]3 years ago

4 0

Answer: x= -1
explanation:
1) 3x-2x = 1x
2) 6-7 = -1

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To join a health club, a person must pay a $75 one-time fee plus a charge of $30 per month. This situation can be presented by a

Rudiy27

Answer:

y = 30x + 75

Step-by-step explanation:

every month you're paying 30 dollars for a fee.

the 75 dollars is simply the "down payment" so to say.

m is the constant growth or the continuous growth or the charge per month.

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3 years ago

Mary takes 50 minutes to wash an elephant and NIgel takes 40 minutes to wash an elephant. If they wash and elephant together, ho

oksano4ka [1.4K]

Answer:

25 minutes

Step-by-step explanation:

When there are to people washing one elephant they will take half the time.

So half of the longest time will be the answer to the question.

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3 years ago

The smith family took three days to drive to Florida. They drove m miles on the first day. On the second day, they drive five mo

irina [24]

Answer: 5m + 20 miles

Step-by-step explanation:

Miles driven on first day = m

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3 years ago

Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It fo

Harman [31]

Answer:

(a) The 90 percent confidence interval for the population mean yearly premium is ($10,974.53, $10983.47).

(b) The sample size required is 107.

Step-by-step explanation:

(a)

The (1 - α)% confidence interval for population mean is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\times \frac{s}{\sqrt{n}}$

Given:

$\bar x=\$10,979\\s=\$1000\\n=20$

Compute the critical value of t for 90% confidence level as follows:

$t_{\alpha/2, (n-1)}=t_{0.10/2, (20-1)}=t_{0.05, 19}=1.729$

*Use a t-table.

Compute the 90% confidence interval for population mean as follows:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\times \frac{s}{\sqrt{n}}$

$=10979\pm 1.729\times \frac{1000}{\sqrt{20}}\\=10979\pm4.47\\ =(10974.53, 10983.47)$

Thus, the 90 percent confidence interval for the population mean yearly premium is ($10,974.53, $10983.47).

(b)

The margin of error is provided as:

MOE = $250

The confidence level is, 99%.

The critical value of z for 99% confidence level is:

$z_{\alpha/2}=z_{0.01/2}=z_{0.005}=2.58$

Compute the sample size as follows:

$MOE= z_{\alpha/2}\times \frac{s}{\sqrt{n}}$

$n=[\frac{z_{\alpha/2}\times s}{MOE} ]^{2}$

$=[\frac{2.58\times 1000}{250}]^{2}$

$=106.5024\\\approx107$

Thus, the sample size required is 107.

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3 years ago

PLZ HELP Classify the number as natural, whole, integer, and/or rational. Select all terms that are correct. 5,947

Brilliant_brown [7]

Answer:

Whole Number

Natural Number

Integer

Rational Number

5,947 is a whole and natural number, an integer and a rational number

Step-by-step explanation:

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4 years ago