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3 years ago

13

20points please help ASAP How do division properties help you evaluate expressions? Drag a word or number to the box to correctl

y complete the statement.

1 answer:

marishachu [46]3 years ago

7 0

Answer:

The properties of real numbers provide tools to help you take a complicated expression and simplify it. i hope this helps a little.

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A $40.00 skateboard is discounted 30%. If sales tax is 5%, what is the amount of tax paid?

tekilochka [14]

$29.40 ........ 40x0.3=12....... 40-12=28...... 28x1.05= $29.40

7 0

3 years ago

Read 2 more answers

Can anyone help on 10, 11, 12, and 13 please

n200080 [17]

The answer to 10 is A......the answer to 11 is D...the answer to 12 is

4 0

3 years ago

If a salesman earned a 6% commission on sales, and in one week he earned $300 in commissions, how much merchandise did he sell t

blsea [12.9K]

Commission = 6% of sales

" 6% " means 0.06
" of " means "times"

Commission = (0.06) x (sales)

$300 = (0.06) x (sales)

Divide each side by 0.06 : $300 / 0.06 = sales

<em> $5,000 = sales </em>

6 0

3 years ago

A random sample of 145 students is chosen from a population of 4,250 students. The mean IQ in the sample is 130, with a standard

snow_tiger [21]

Answer:

Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956

Step-by-step explanation:

The formula to use to solve this question is called the Confidence Interval formula.

Confidence interval =

x ± z × ( σ/ (√n) )

Where:

x = the sample mean = 130

z = the z-value for 90% confidence = 1.645

σ = standard deviation = 7

n = sample size = 145

130 ± 1.645 × (7/√145)

130 ± 0.9562687005

130 - 0.9562687005 = 129.0437313

130 + 0.9562687005 = 130.9562687005

Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956

7 0

3 years ago

What is an equation in slope-intercept form for the line that passes through the points (1 -3) and (3 1)

Bas_tet [7]

Answer:
$y = 2x - 5$

Explanation:

Slope-intercept form formula:
$y = mx + b$
For this formula we need the slope to find the slope use the slope formula:
$\frac{y_{2} - y}{x_{2} - x}$
Plug in the two points (1,-3) and (3,1)
$\frac{1 - - 3}{3 - 1}$
$\frac{4}{2}$
=2
the slope is 2

Now use the slope-interpect formula and plug in the slope (m)
$y = 2x + b$
plug in one point I'll use (3,1)
$1 = 2(3) + b$
1 = 6 +b
1-6=6-6+b
-5 = b

The equation would be:
$y = 2x - 5$

4 0

3 years ago