All categories

2 years ago

3(x - 4) + 9 = 18 Step by step (and explanation)

Mathematics

1 answer:

Andrews [41]2 years ago

3 0

Answer:

= 7

Step-by-step explanation:

3(x−4)+9=18

3 − 1 2 + 9 = 1 8

3 − 3 = 1 8

3 = 1 8+3

3 = 21

x= 21/3

x=7

You might be interested in

Convert the following units of time. a. 5 years to days b. 8 weeks to days c. 7 days to weeks d. 336 hours to seconds e. 12 hour

AysviL [449]

Answer:

A. 1,825 days

B. 56 days

C. 1 week

D. 1,209,600 seconds

E. 43,200 seconds

F. 2 hours

Step-by-step explanation:

A. 1 year = 365 days, then

5 years = $5\cdot 365$ days = 1,825 days.

B. 1 week = 7 days, then

8 weeks = $8\cdot 7$ days = 56 days.

C. 7 days = 1 week.

D. 1 hour = 3,600 seconds, then

336 hours = $336\cdot 3,600$ seconds = 1,209,600 seconds.

E 12 hours = $12\cdot 3,600$ seconds = 43,200 seconds.

F. 3,600 seconds = 1 hour, then

7,200 seconds = $\dfrac{7,200}{3,600}$ hours = 2 hours.

3 0

3 years ago

Read 2 more answers

Does anyone know this? Needed ASAP

anzhelika [568]

Answer:

50 square units

Step-by-step explanation:

Using the formula provided, $a = \frac{1}{2}h(b_1+b_2)$ , substituting the height (5), b1 (8) and b2 (12), we can solve for the formula.

$a = \frac{1}{2}\cdot5(8+12)\\\\a = \frac{1}{2}\cdot5(20)\\\\a = \frac{1}{2}100\\\\a = 50$

Hope this helped!

4 0

2 years ago

Read 2 more answers

Bob has some 10 lb weights and some 3 lb weights. Together, all his weights add up to 50 lbs. If x represents the number of 3 lb

RUDIKE [14]

The equation would be 3x+10y=50.

7 0

2 years ago

6. slope = 9, (-5, 2) no links or bots please

Arada [10]

Answer: y= 9x -5

Step-by-step explanation:

3 0

2 years ago

Keith tabulated the following values for time spent napping in minutes of six of his friends: 23, 35, 17, 30, 20, and 19. The st

vovikov84 [41]

Using the t-distribution, the t-statistic for the two-sided test would be of t = 0.7.

<h3>What is the test statistic for a t-distribution hypotheses test?</h3>

The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the expected value.

s is the standard deviation of the sample.

n is the sample size.

The values of the parameters are given as follows:

$\mu = 22, s = 7.043, n = 6$ .

The sample mean is:

$\overline{x} = \frac{23 + 35 + 17 + 30 + 20 + 19}{6} = 24$

Hence the test statistic is:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{24 - 22}{\frac{7.043}{\sqrt{6}}}$

t = 0.7.

More can be learned about the t-distribution at brainly.com/question/16194574

5 0

1 year ago