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3 years ago

Solve 19.9 = 9y - 8. y =

Mathematics

2 answers:

iris [78.8K]3 years ago

7 0

Answer:

y=18.9

Step-by-step explanation:

19.9+8=27.9

27.9-9=18.9

qaws [65]3 years ago

4 0

The answer is Y=199/10 or y=19 9/10

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vodka [1.7K]

0.3x0.8=0.24 so 24% chance he wont have to stop i think

8 0

3 years ago

Read 2 more answers

I need help on this can some one explain it and answer please!!!!

Alex_Xolod [135]

Answer:

4(a). C= 3 + 1.5x

b. 'x' stands for the number of times the cup is refilled.

c. 3 + 1.5 (5)= $10.50

d. My answer to part (c) makes sense because the price of the cup is $3, and I have to pay $1.50 for each additional refill, in accordance to the formula I wrote.

Step-by-step explanation:

The original price of the cup is 3 dollars, but with each refill you get, you have to pay $1.50.

6 0

2 years ago

What is the standard deviation of the following data set rounded to the nearest tenth? 56 ,78 ,123 , 34, 67, 91, 20

quester [9]

Answer:

The standard deviation of the following data set is 32.2

Step-by-step explanation:

step 1

Find the mean

we have

$[56,78,123,34,67,9,20]$

Sum the data and divided by the number of elements

$[56+78+123+34+67+91+20]/7=469/7=67$

step 2

For each number: subtract the Mean and square the result

$[(56-67)^{2},(78-67)^{2},(123-67)^{2},(34-67)^{2},(67-67)^{2},(91-67)^{2},(20-67)^{2}]$

$[121,121,3,136,1,089,0,576,2,209]$

step 3

Work out the mean of those squared differences

$[121+121+3,136+1,089+0+576+2,209]/7=1,036$

This value is called the "Variance"

step 4

Take the square root of the variance

$standard\ deviation=\sqrt{1,036}=32.2$

6 0

3 years ago

Solve four square root of six plus eight square root of four and explain whether the answer is rational or irrational.

Inga [223]

Answer:

$4\sqrt{6}+16$

Step-by-step explanation:

Given the expression: $4\sqrt{6}+8\sqrt{4}$

$\sqrt{4}=2\\$Therefore, \\4\sqrt{6}+8\sqrt{4} =4\sqrt{6}+8*2\\ =16+4\sqrt{6}$

We can re-write the answer as:

$4\sqrt{6}+16$

The answer is irrational because the sum of a rational number and irrational number is an irrational number.

<u>The correct option is B.</u>

7 0

3 years ago

Need help plss hurry last day

Valentin [98]

Answer:

Write 21 in the soup column and 25 in the peanut butter column.

Explanation:

The ratio of cans of soup to jars of peanut butter was 7:5

If the jars of peanut butter were 15, then the cans of soup would be (7/5 × 15) = 21

If the cans of soup were 35, then the jars of peanut butter would be (5/7 × 35) = 25

3 0

3 years ago