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2 years ago

I NEED HELP PLEASE!!

Mathematics

2 answers:

Nimfa-mama [501]2 years ago

7 0

Answer:

f=15

Step-by-step explanation:

set 2.5 over 1 to make it a fraction and cross multiply

nadya68 [22]2 years ago

3 0

Yea it’s correct f=15

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I need help, I dont know how to convert ratios into decimals and percentages [EX: write the ratio 5 to 8 in a decimal/percent]

Anon25 [30]

Fractions are just unsimplified numbers. For example 5/8 is just 5 divided by 8 so 0.625. To find the percent from that you move the decimal two places to the right making it 62.5%. Hope this helps!

5 0

2 years ago

Help me with this plzzz

kogti [31]

The answer is c 16475

5 0

3 years ago

Read 2 more answers

5. If the covariance between the variables x and y is 18 and the variance

klasskru [66]

Answer:

The coefficient of correlation=0.5

Step-by-step explanation:

We are given that

Covariance between the variable x and y=18

Variance of x=16

Variance of y=81

We have to find the coefficient of correlation

We know that

Coefficient of correlation

$r=\frac{covariance(x,y)}{\sqrt{variance(x)}\times \sqrt{variance(y)}}$

Using the formula

$r=\frac{18}{\sqrt{16}\times \sqrt{81}}$

$r=\frac{18}{4\times 9}$

$r=0.5$

Hence, the coefficient of correlation=0.5

5 0

3 years ago

5(a−b), if a=−4; b=−2

Helen [10]

Step-by-step explanation:

Putting values of a and b

5 ( - 4 - (-2))

5 ( - 4 + 2)

5 ( - 2)

= - 10

4 0

3 years ago

Evaluate 0.1 m + 8 - 12 n when m = 30 and n = 1 /4

Advocard [28]

Answer:

$8$

Step-by-step explanation:

$0.1m + 8 - 12n \\ 0.1 \times 30 + 8 - 12 \times \frac{1}{4} \\ = 3 + 8 - 3 \\ = 8$

hope this helps

brainliest appreciated

good luck! have a nice day!

3 0

3 years ago