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UNO [17]
3 years ago
15

What is the value of the expression 8w−4j2 when w=0.25 and j=0.5?

Mathematics
1 answer:
Alex787 [66]3 years ago
3 0

Answer:

-2

Step-by-step explanation:

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6. Emily rides her bike with a constant speed of
qaws [65]

Answer:

42 miles

Step-by-step explanation:

If it's a constant 12 miles per hour then it would be

12 mph x 3 hours = 36

then you would add that with the 1/2 hour for

12 mph x 1/2 hours = 6

36 + 6 = 42 miles traveled

8 0
2 years ago
What percentage of 128 is 96?
katrin [286]
So, since 100% = 128, x should equal 96, and we are trying to find x.
Multiply both sides of the equation by x.
(100/x) * x = (128/96) * x
Cancel out the x's on the left side so
100 = 1.333(x)
75 = x
96 is 75% of 128
7 0
3 years ago
Read 2 more answers
Write -6/11 as a decimal step by step please
Brums [2.3K]

Answer:

-0.545454545454 repeating. there shouldnt be any steps its simple calculation.

Step-by-step explanation:

3 0
3 years ago
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In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. Suppose 200 adults from th
cricket20 [7]

Answer: 0.0793

Step-by-step explanation:

Let the IQ of the educated adults be X then;

Assume X follows a normal distribution with mean 118 and standard deviation of 20.

This is a sampling question with sample size, n =200

To find the probability that the sample mean IQ is greater than 120:

P(X > 120) = 1 - P(X < 120)

Standardize the mean IQ using the sampling formula : Z = (X - μ) / σ/sqrt n

Where;  X = sample mean IQ; μ =population mean IQ; σ = population standard deviation and n = sample size

Therefore, P(X>120) = 1 - P(Z < (120 - 118)/20/sqrt 200)

                                 = 1 - P(Z< 1.41)

The P(Z<1.41) can then be obtained from the Z tables and the value is 0.9207

Thus; P(X< 120) = 1 - 0.9207

                          = 0.0793

3 0
3 years ago
If the arc length of a sector in the unit circle is 4.2, what is the measure of the angle of the sector
____ [38]
S = rθ
4.2 = 1*θ

The central angle (θ) is 4.2 radians.
7 0
3 years ago
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