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Sonbull [250]
3 years ago
11

Solve the equation -3x(x-1)+7x=27

Mathematics
2 answers:
Rama09 [41]3 years ago
7 0

Answer:

6,5

Step-by-step explanation:

-3x(x-1)+7x=27

-3x²+1+7=27

-4x+1=27

4x=1-27

x=26/4

x=6,5

guapka [62]3 years ago
6 0

-3x^2 +3x + 7x = 27

-3x^2 +10x - 27 = 0

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Give the formula in finding the surface area of the cube
Korolek [52]

Answer:

A=6a²

Step-by-step explanation:

Lowercase a is the length of one side.

8 0
2 years ago
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For the most recent year available, the mean annual cost to attend a private university in the United States was $20,307. Assume
Maksim231197 [3]

Answer:

27,361.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 20307, \sigma = 4275

Ninety-five percent of all students at private universities pay less than what amount?

This is the 95th percentile, that is, X when Z has a pvalue of 0.95. So X when Z = 1.65.

Z = \frac{X - \mu}{\sigma}

1.65 = \frac{X - 20307}{4275}

X - 20307 = 1.65*4275

X = 27,361

So the answer is 27,361.

7 0
3 years ago
Tanya has several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minutes, and two
stira [4]
50% because there are 4 routes and 2 take 30 minutes, 2/4 = 50/100 = 50%
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3 years ago
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Simplify the expression.
sasho [114]
2^3z^9
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Enjoy!=)
4 0
2 years ago
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Find the Product and Combine similar terms.<br>1. -1(7+4b) =<br>2. x(x²–2xy+y²) =<br>3. -5x(-3+x) =​
sergejj [24]
-1(7+4b) - distribute the -1 to the expression
(-1 * 7) + (-1 * 4b) — ( + and - = - )when it is multiplied
= -7 - 4b — there is no like term to added to subtracted so it will stay as like

x(x^2 - 2xy+y^2) distribute x to all
= x(x^2) - x(2xy) + x(y^2)
= x^3 - 2x^2y + xy^2 in multiplication exponent add to similar variable
No like term to connect

-5x(-3+x)
= -5x(-3) -5x(+x). (- and - is +)
= 15x -5x. similar variable x so connect the like connect like term by subtracting them
= 10x


3 0
2 years ago
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