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xeze [42]
3 years ago
7

85% of x is 51. Write an equation that represents the situation

Mathematics
1 answer:
Travka [436]3 years ago
8 0

Answer:

85%*x =51

Step-by-step explanation:

of means multiply

Hence,

     85% times x =51

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-x/8<-1/2 solve each inqequality
Sindrei [870]
-x/8<-1/2. Use the reverse order of operations to solve this. So, as both sides are negative, multiply them by -1 to get you to x/8>1/2, as multiplying by a negative flips the symbol. Solve that by multiplying 1/2 to 8/1. Multiply the numerators and denominators, to give you 8/2. Simplified, x>4
3 0
3 years ago
A set of piano prices distributed at a mean of 3000 and a standard deviation of 200 dollars. An electric piano has a price of 25
lana [24]

Answer:

The proportion of piano prices higher than the electric piano is 98.3%

Step-by-step explanation:

The first thing to do here is to calculate the standard score of the price of the electric piano given.

Mathematically, this is

z-score = (x-mean)/SD

where mean is 3000 and SD is 200, x is 2576

z-score = (2576-3000)/200 = -2.12

Now we proceed to calculate the probability of this z-score

The probability we are trying to calculate is

P( x > $2576) or simply P ( z > -2.12)

Using standard score probability calculator or table, we have

P(x>2576) = 1 - P(x<2576)

But, P(x<2576) = 0.017003

P(x>2576) = 1 - P(x<2576) = 0.983

This is same as 98.3%

4 0
3 years ago
Given directed line segment PR, find the coordinates of Q on PR such that the ratio of PQ to QR is 2:1.
Alekssandra [29.7K]

Answer:

4/3, -3

Step-by-step explanation:

4 0
2 years ago
Please help 20 POINTS
Elenna [48]

Answer:

5 4/5

Step-by-step explanation:

First of all subtract the whole number, 2, from 8 1/5

You would get 6 1/5

Now subtract 2/5 from that, or set up an equation like:

6 + 1/5 - 2/5

you would get 6 - 1/5 or 5 4/5

-Chetan K

6 0
2 years ago
Read 2 more answers
Find the distance between the points (-1,-2) and (5,2). Simplified radical form.
frozen [14]

Answer:

2\sqrt{13}

Step-by-step explanation:

Using the distance formula,

\sqrt{( x_{2}-x_{1} )^2+(y_{2} -y_{1})^2 }

We just need to plug in the numbers.

So \sqrt{(-1-5)^2+(-2-2)^2}

Then we simplify it to

\sqrt{(-6)^2+(-4)^2} , to \sqrt{36+16}

Finally, we get

\sqrt{52}, which is 2\sqrt{13} when simplified.

3 0
2 years ago
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