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Xelga [282]
3 years ago
13

If 3/4 of a number is 15 then what is four fifths of the number

Mathematics
2 answers:
Rzqust [24]3 years ago
7 0

Answer:

20

Step-by-step explanation:

3/4 is fifteen so you divide 15 by 3 to get 5, so if 5 time 3 id 15 then 5 times 4 is 20

hope this helps!

koban [17]3 years ago
3 0

Answer:

20

Step-by-step explanation:

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Find the coordinates of the missing endpoint if M is the midpoint of DF <br> F(2,9) M(-1,6)
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Answer:

(-4,3)

Step-by-step explanation:

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3 years ago
Resistors are labeled 100 Ω. In fact, the actual resistances are uniformly distributed on the interval (95, 103). Find the mean
Zinaida [17]

Answer:

E[R] = 99 Ω

\sigma_R = 2.3094 Ω

P(98<R<102) = 0.5696

Step-by-step explanation:

The mean resistance is the average of edge values of interval.

Hence,

The mean resistance, E[R] = \frac{a+b}{2}  = \frac{95+103}{2} = \frac{198}{2} = 99 Ω

To find the standard deviation of resistance, we need to find variance first.

V(R) = \frac{(b-a)^2}{12} =\frac{(103-95)^2}{12} = 5.333

Hence,

The standard deviation of resistance, \sigma_R = \sqrt{V(R)} = \sqrt5.333 = 2.3094 Ω

To calculate the probability that resistance is between 98 Ω and 102 Ω, we need to find Normal Distributions.

z_1 = \frac{102-99}{2.3094} = 1.299

z_2 = \frac{98-99}{2.3094} = -0.433

From the Z-table, P(98<R<102) = 0.9032 - 0.3336 = 0.5696

5 0
4 years ago
Please help!!! thank you
fiasKO [112]

Answer:

28

Step-by-step explanation:

140 divided by 5 is 28

224 divided by 8 is 28

480 divided by 15 is 28

3 0
3 years ago
Read 2 more answers
How do I find the arc from a central angle?
Lesechka [4]

Answer:

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8 0
3 years ago
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If the measure of the angle in the southwest corner of the intersection of Broadway and 21st Street is approximately 105ºwhat is
Karolina [17]

Answer:

95°

Step-by-step explanation:

The angle on the 20TH street and 22ND street must add up to 180° so the answer is 95°

5 0
3 years ago
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