2 years ago

Which expression is equivalent to (3a)–2?

Mathematics

2 answers:

Sati [7]2 years ago

7 0

Answer:

Step-by-step explanation:

dimulka [17.4K]2 years ago

4 0

The awnser is D but could also maybe be B

You might be interested in

A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

Lelu [443]

Answer:

95% Confidence interval: (0.375,0.377)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 0.376 cc/cubic meter

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation, s = 0.0012

Degree of freedom =

$=n-1\\=15-1\\=14$

95% Confidence interval:

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

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.145$

$0.376 \pm 2.145(\dfrac{0.0012}{\sqrt{15}} )\\\\ = 0.376 \pm 0.0006\\\\ = (0.3754,0.3766)\approx (0.375,0.377)$

(0.375,0.377) is the required 95% confidence interval for the population mean potassium chloride concentration.

5 0

2 years ago

A.3.5 B.-2.5 C.-5.5 D.2.5

mart [117]

The answer is 2.5 because the point is on -1.5, so -1.5+4=2.5

7 0

3 years ago

I Will give brainliest

saveliy_v [14]

Answer:

466 and 286

Step-by-step explanation:

7 0

3 years ago

Write an equation in slope- intercept form for the line with slop-1/4 and y-intetcept 5

Rashid [163]

Y=mx+b
m=slope
b=yintercept

given
slope=-1/4
yint=5

y=-1/4x+5

6 0

2 years ago

Read 2 more answers

Find the slope of the line that passes through (4, 6) and (2, 3).

Verizon [17]

The slope is 3/2

To find the slope, you have to use the slope formula

y2-y1/x2-x1

6-3/4-2

3/2

So the slope is 3/2

3 0

2 years ago