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Gemiola [76]
3 years ago
13

Pls help it due ASAP and please show workings

Mathematics
1 answer:
Svetllana [295]3 years ago
5 0

Answer:

X = 5

Step-by-step explanation:

4x - 7 = 2x + 3

(4x-4x) - 7 = 2x(-4x) + 3

(-7-3) = -2x + (3-3)

-10 = -2x

-10/-2x = 5

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A home business has an average income of $900.00 per month with a standard deviation of $15.00. If the income in a given month i
Alex73 [517]
Z score is a statistical that corresponds to the standarization of the regular score to a normal dsitribution

The formula for Z score is Z = [X - mean ]./ (standar deviation)

Here X = 930.00; mean = 900.00; and standard deviation = 15.00

Then, Z = [930.00 - 900.00] / 15.00 = 30.00 / 15.00 = 2.00

Answer: 2.00
7 0
3 years ago
A car covers a distance of 200 m. If its velocity is 20 m/s, calculate the<br>time taken.​
DerKrebs [107]

Answer:

10 seconds

Step-by-step explanation:

Distance = 200 m

Velocity = 20m/s

Time =?

time =  \frac{distance}{velocity}  \\ time =   \frac{200m}{20m/s}  \\ time = 10 \: seconds

8 0
3 years ago
Why is the product of two rational numbers always rational?
ludmilkaskok [199]

Answer:

all three blanks are integers

Step-by-step explanation:

Let a/b and c/d represent two rational numbers. This means a, b, c, and d are _integers____, and b and d are not 0. The product of the numbers ac/bd, where bd is not 0. Both ac and bd are  integers_____, and bd is not 0. Because ac/bd is the ratio of two integers_____, the product is a rational number.

5 0
4 years ago
PLEASE HELP WILL GIVE POINTS PLEEEEASE!!!!!!!!!!!!!!
mixer [17]

Answer:

b=-2

Step-by-step explanation:

3√-8 = -2

-2^3 = -8

8 0
4 years ago
In his free time, Gary spends 11 hours per week on the Internet and 11 hours per week playing video games. If Gary has five hour
Tpy6a [65]

Answer:

62.8% OR 0.628

Step-by-step explanation:

11 hours playing video games

11 hours on the Internet

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5 hours of free time each day

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5 x 7 = 35

22/35 hours are spent

That is 0.62857142857 or I just mathmatically rounded to 0.628

0.628 into a fraction is 62.8%

6 0
3 years ago
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