All categories

3 years ago

PLEASE ANSWER AND EXPLAIN I’LL MARK BRAINLIEST

Mathematics

1 answer:

ale4655 [162]3 years ago

3 0

Answer/Step-by-step explanation:

a. x(x - 3) + 2(x - 3)

x*x + x*-3 + 2x + 2*-3 (distributive property)

x² - 3x + 2x - 6

Add like terms

x² - x - 6

b. 2x(x - 4) -3(x - 4)

2x*x + 2x*-4 -3*x -3*-4 (distributive property)

2x² - 8x - 3x + 12

Add like terms

2x² - 11x + 12

c. x(x - 2) + 2(x - 2)

x*x + x*-2 + 2*x + 2*-2 (distributive property)

x² - 2x + 2x - 4

Add like terms

x² - 0 - 4

x² - 4

You might be interested in

What is the slope of the line that passes through the points (9,-1) and (4,-11)

ValentinkaMS [17]

For some reason i got 95/36 my bad fam

7 0

3 years ago

An electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricit

TiliK225 [7]

Answer:

atleast 385

Step-by-step explanation:

Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.

Population std deviation = $\sigma = 50$

Sample size = $n$

STd error of sample mean = $\frac{50}{\sqrt{n} }$

Margin of error for 95% would be Critical value ( std error)

Here since population std dev is known we can use Z critical value= 1.96

$1.96*\frac{50}{\sqrt{n} }19.6^2\\n>384.16$

Sample size should be atleast 385

5 0

4 years ago

What is the solution set? 1/2x - 6.5 > 12

Nana76 [90]

Answer: x > 37
Step 1: You add 6.5 to both sides so you end up with:
1/2x > 18.5
Step 2: You then Multiple both sides by the reciprocal of 1/2 which is 2/1.
(2/1)1/2x > 18.5(2/1)
Step 3: Work it out and you will have x by itself.
x > 37

6 0

3 years ago

The equation of the line through (3,-4) with slope 2/3 is?

alexira [117]

E maybe not certain that it is correct, hope it helps even tho i might be wrong

6 0

4 years ago

What is the interest rate if the principle is $32000 and the interest earned was 9600 over six years

babymother [125]

Answer:

40%

Step-by-step explanation:

7 0

4 years ago