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rusak2 [61]
3 years ago
6

For questions 1- 3 find the exact sum or difference.

Mathematics
1 answer:
7nadin3 [17]3 years ago
6 0
D, Because 7/15 + 9/15 is 16/15 + 4/15 =20/15 which equals 1 5/15 which turns into 1 1/3
A, 1/21 + 2/21 = 3/21 and that equals 1/7

C, 3/14+3/12 turns into 3/14+5/14= 10/14 - 8/14= 2/14=1/7
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What is the best estimate for the value of r in the scatter plot?
Wittaler [7]

From the observation of the dispersion graph it is concluded that the answer to this question is option D. r = -0.5.

The correlation coefficient "r" is a measure of the linear relationship between two random variables.

When the correlation is positive, the value of "r" is between 0 and 1. This means that when one variable increases the other too.

When the correlation is negative, the value of "r" is between -1 and 0. This means that one variable decreases as the other increases.

When there is no correlation the value of "r" is 0


In this case, the dispersion chart shows that the variable "y" decreases as the variable "x" increases. Therefore the value of "r" must be negative. Of all the options, the only one that presents a value of negative r is option D:

 r = -0.5

5 0
3 years ago
Divide 2 over 3 ÷ 1 over 6 = ____.
Ad libitum [116K]

\frac{2}{3}  \div  \frac{1}{6}
{is the same as / equal to:}
\frac{2}{3}  \times  \frac{6}{1}  \\  =  \frac{2}{3}  \times 6 \\  =  \frac{2 \times 6}{3}  \\  =  \frac{12}{3}
{Simplify the fraction to become:}
= 12 \div 3 \\  = 4

Hope this helps! :)
6 0
3 years ago
Write nine hundred and eight tenths as a decimal number.
IrinaK [193]

Answer:

900.80

Step-by-step explanation:

900 + .8

900.80

5 0
3 years ago
During the candy sale the three students in matts group raised the total of 732.53.Bob sold 232.46 worth of candy.Cathy sold 189
zhannawk [14.2K]

Answer:

matt sold 310.86

Step-by-step explanation:

first add  bob's worth and cathy's worth, 189.21 +232.46=421.67.   then subtract the answer by the total amount they all had, 732.53 - 421.67 = 310.86

4 0
4 years ago
How do you solve this equation 3^3x-7=81^12-3x
slavikrds [6]
I think you meant...

3^(3x-7)=81^(12-3x)    (note that 81=3^4) so

3^(3x-7)=3^4^(12-3x)

3^(3x-7)=3^(48-12x)  taking log or natural log of both sides show that

3x-7=48-12x

15x=55

x=11/3
6 0
3 years ago
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