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3 years ago

Simplity 2(- 4)+7(x + 2).

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

7 0

Answer:

Step-by-step explanation:

To find your answer you first have to multiply the numbers that aren’t in parentheses and you multiply 2 and 7 and you get 14 then you don’t have to worry about the x because it is a variable so now add -4 +2. but first we have to turn negative into positive so you add -4 + 8

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How many kilometers are in 3 centimeters?

Crazy boy [7]

Answer:

0.00003

Step-by-step explanation:

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3 years ago

What number Make The equation 3× + 2= 12 ? A 1 B 2 C 4 D 6

wlad13 [49]

None of the answers are correct
a is 3 to the 1st power= 3
b is 3 to the 2nd power=9
c is 3 to the 4th power= 81
d is 3 to the 6th power= 729

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4 years ago

Insturctions to care for a plant say to water it with 3/4 cup of water every day.The plant has been getting 25% too much water.

disa [49]

For this case we propose a rule of three. We assume that the excess water received was in one day. So:

$\frac {3} {4}$ cup ------> 100%

x ----------------------------> 25%

Where "x" represents excess water.

$x = \frac {25 * \frac {3} {4}} {100}\\x = \frac {\frac {75} {4}} {100}\\x = \frac {75} {400}\\x = \frac {15} {80}\\x = \frac {3} {16}$

Thus, the excess water is $\frac {3} {16}$ cups.

Then, in one day you receive in total:

$\frac {3} {4} + \frac {3} {16} = \frac {16 * 3 + 4 * 3} {16 * 4} = \frac {48 + 12} {64} = \frac {60 } {64} = \frac {15} {4}$ cups of water.

Answer:

$\frac {15} {4}$ cups of water

3 0

3 years ago

A measure of the strength of the relationship between two variables is referred to as the A. standard deviation of the estimate.

marin [14]

Answer:

D. Coefficient of Correlation

Step-by-step explanation:

The name itself "Coefficient of Correlation" involves the word correlation, meaning relationship between two things.

The coefficient of Correlation is used to determine how strong a relationship is between two variables.

The formula of Coefficient of Correlation gives a value between -1 and 1. Moreover, it helps to plot a graph showing the strength of relationship.

1 : A strong positive relationship

-1: A Strong negative relationship

0: No relationship at all

One of the most used formula is Pearson Correlation Coefficient Formula, picture of which is attached. X and Y represent two different set of datas.

Note:

The other terms are defined as :

Coefficient of Determination : Square of correlation between predicted scores and actual scores. It usually ranges from 0 to 1 .

Standard deviation of estimate : represents the amount of variation among a set of values .

Standard Error of estimate : It is the measure of dispersion of sample means around population means.

6 0

3 years ago

I need help please.

4vir4ik [10]

Answer:

Hi! The correct answer is D. 0.0140

Step-by-step explanation:

Convert the fraction part to a decimal then add the results to the whole number part.

8 0

3 years ago