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3 years ago

I need a answer fast

Mathematics

1 answer:

kykrilka [37]3 years ago

8 0

Answer:

Step-by-step explanation:

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Solve each equation by taking square roots n^2 -7=38

Snowcat [4.5K]

$n^2 -7=38$

$n^2=38+7$ $Add \ 7 \ to \ both \ sides$

$
n^2=45
 
$

$n=+ \sqrt{45}$

$n=+3 \sqrt{5}$

8 0

3 years ago

What the solution set of the inequality 15y - 9 < 36

Alika [10]

15y - 9 < 36

15y - 9 + 9 < 36 + 9

15y < 45

15y ÷ 15 < 45 ÷ 15

y < 3

Hope this helps!!
~Kiwi

6 0

4 years ago

There is a 10% chance of the mean oil-change time being at or below the sample mean for which there is an area of 0.10 to the

Zarrin [17]

The probability that a normally distributed data with a mean of μ and a standard deviation of σ is less than a value x is given by:

$P(X\ \textless \ x)=P\left(z\ \textless \ \frac{x-\mu}{\sigma} \right)$

Given that μ = 16.5 and σ = 0.804984 and that the probability that the mean oil-change time being at or below the sample mean for which there is an area of 0.10 to the left under the normal curve, then:

$P\left(z\ \textless \ \frac{x-16.5}{0.804984} \right)=0.1\\ \\ \Rightarrow P\left(z\ \textless \ \frac{x-16.5}{0.804984} \right)=P(z\ \textless \ -1.281) \\ \\ \Rightarrow\frac{x-16.5}{0.804984}=-1.281 \\ \\ \Rightarrow x-16.5=-1.281(0.804984)=-1.031 \\ \\ x=-1.031+16.5=15.47$

6 0

4 years ago

PLEASEEEE I BEG YOU PLZZZ SOMEBODY GIVE ME THE RIGHT ANWSERSS TO THESEEE AND I DONT WNAT ANY WRONG ONES ARE REPORT JUST HELPP CU

fredd [130]

Answer:

Step-by-step explanation:

Question 1: C

1 multiplied by 5 = 5

1 plus 5 = 6

So you get: (x+5)(x+1) which means x = -5 or -1

Question 2: B

2 multiplied by -4 = - 8

2 plus -4 = -2

So you get: (x-4)(x+2) which means x = 4 or -2

6 0

3 years ago

7 How can this product be simplified? 5x²(2x - 3)

Burka [1]

Answer:

25x³-15x²

Step-by-step explanation:

multiplying,

5x² ×2x = 25x³

5x² × 3 = 15x²

25x³- 15x²

4 0

3 years ago