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miv72 [106K]
4 years ago
12

2.5% of what is 2.21

Mathematics
1 answer:
BlackZzzverrR [31]4 years ago
8 0
In math: "of" means times
               "is" means =

Since we have 2.5% of "what", we can replace what with a variable, say "y"

So now we can rewrite our equation...

2.5% * y = 2.21

We need to convert 2.5% to a decimal, so divide by 100 (or simply move the decimal 2 places to the left...

.025 * y = 2.21

Now we want to get the variable, y, by itself so we divide each side by .025

y = 2.21/.025

Now simplify by dividing

y = 88.4

2.5% of 88.4 is 2.21
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(5,1); m=2 write an equation of the line
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Hey there! :) 

To find an equation of a line that passes through (5, 1) and has a slope of 2, we'll need to plug our known variables into the slope-intercept equation.

Slope-intercept equation : y = mx + b ; where m=slope, b=y-intercept

Since we're already given the slope, all we really need to do is find the y-intercept.

We can do this by plugging our known values into the slope-intercept equation.

y = mx + b

Since we're trying to find "b," we need to plug in "y, m, x" into our formula.

(1) = (2)(5) + b

Simplify.

1 = 10 + b

Subtract 10 from both sides.

1 - 10 = b

Simplify.

-9 = b

So, our y-intercept is 9! 

Now, we can very simply plug our known values into slope-intercept form.

y = mx + b

y = 2x - 9 → final answer

~Hope I helped!~
3 0
3 years ago
What color will the paper appear? <br> Explain why?
Ray Of Light [21]
White cause isrs normal
4 0
3 years ago
Read 2 more answers
What is equivalent to 3 radical 8
liq [111]

Answer:

C. 8^x/3

Step-by-step explanation:

According to algebraic principles, if n is the root of a number, then that number to the power of 1/n is equal to it. This would mean that n√a = a^1/n.

This would mean that 3√8 = 8^1/3. When there is a power added to a radical expression such as this, that power will go on the denominator. So (3√8)^2 for example is equal to 8^2/3, and in your case, (3√8)^x = 8^x/3

looking back on the fact that this was added 2 days ago i dont think this helped on your quiz

6 0
4 years ago
5. What is the value of the expression [(29 + 18) +<br>(17 - 8)] = 8?<br>S​
Vladimir [108]

Answer:

False ; the answer to that equation is 56

Step-by-step explanation:

6 0
3 years ago
A boy’s age is 5 years less than one- third of his father’s age. If the difference in their age is 23, what is the age of the bo
elena-14-01-66 [18.8K]
6

23-5=18
18/3=6

Hope it helps
6 0
2 years ago
Read 2 more answers
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