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Gnesinka [82]
2 years ago
13

What is 2x + 2 when x = 0? A 0 B 2 C 20 D 22

Mathematics
2 answers:
guajiro [1.7K]2 years ago
8 0

Answer:

B. 2

Step-by-step explanation:

Step 1:

2x + 2          Equation

Step 2:

2 ( 0 ) + 2        Input x value

Step 3:

0 + 2        Multiply

Answer:

B. 2

Hope This Helps :)

11Alexandr11 [23.1K]2 years ago
7 0

Answer:

B

Step-by-step explanation:

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Simplify<br><br> √12m • √15m<br><br> = [1] m √[2]
Elodia [21]

Answer:

  6m√5

Step-by-step explanation:

  √(12m)·√(15m) = √(180m²) = √(5·(36m²)) = √5·√(6m)²

  = 6m√5 . . . . . . for m ≥ 0

8 0
3 years ago
There are 10 rolls of film in a box and 3 are defective. two rolls are selected without replacement. what is the probability of
german

P(picking one defective) = 3/10
P(picking a 2nd defective) = 2/9


P(1 and 2  defective) = 3/10 x 2/9  = 6/90 = 0.066

Second method using combination:
 ³C₂ / ¹⁰C₂ = 1/15 = 0.066
4 0
3 years ago
Use mental math to evaluate the expression 6(31)+6(4)-6(15)
Finger [1]
Remember distributive property
a(b+c)=ab+ac
we can ervers it

6(31)+6(4)-6(15)=6(31)+6(4)+6(-15)=6(31+4-15)=6(20)=120
3 0
3 years ago
Read 2 more answers
The standard IQ test has a mean of 97 and a standard deviation of 17. We want to be
densk [106]

Let's call our estimate x. It will be the average of n IQ scores. Our average won't usually exactly equal the mean 97.  But if we repeated averages over different sets of tests, the mean of our estimate the average would be the same as the mean of a single test,

μ = 97

Variances add, so the standard deviations add in quadrature, like the Pythagorean Theorem in n dimensions.  This means the standard deviation of the average x is

σ = 17/√n

We want to be 95% certain

97 - 5 ≤ x ≤ 97 + 5

By the 68-95-99.7 rule, 95% certain means within two standard deviations. That means we're 95% sure that

μ - 2σ ≤ x ≤ μ + 2σ

Comparing to what we want, that's means we have to solve

2σ = 5

2 (17/√n) = 5

√n = 2 (17/5)

n = (34/5)² = 46.24

We better round up.

Answer: We need a sample size of 47 to be 95% certain of being within 5 points of the mean

6 0
3 years ago
What is x if the volume of<br> the box is 70 in^3 ?
kirza4 [7]

Answer:

12.25.

Step-by-step explanation:

1) the formula of the volume given in the condition is:

V=2*2/7*10x.

2) If V=70, then

2*2/7*10x=70, where x=12.25.

6 0
2 years ago
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