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AVprozaik [17]
3 years ago
11

24 is 40% of what number ?

Mathematics
1 answer:
alexira [117]3 years ago
5 0
<span>40% * x = 24 

We simply the 40% into either 2/5 (40/100) or 0.40. I will show both ways: 

(using 2/5) 

(2/5)x = 24 

We multiply each side by 5, and divide by 2 (or multiply by 5/2) 

(5/2)(2/5)x = 24(5/2) = (10/10)x = 120/2 

Simplified, we get x = 60. So 40% of 60 is 24. 

Here is the same problem again, this time written out with 0.40 instead of 2/5 

0.40(x) = 24 

(I like to multiply by 100 to get an even 40 instead of .40, so I am going to multiply each side by 100 to make things a little easier). 

40x = 2400 

Divide each side by 40 to isolate x 

x = 2400/40 

We simply to get x = 60, the same answer.  s</span><span>oo 24 is 40% of 60 :)
</span>
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Why does (-4 1/2)^2 = 20.25? Thank you please hurry!
AnnZ [28]

Answer:

See below.

Step-by-step explanation:

Squaring a number means to multiply the number by itself.

For example, 3^2 means 3 * 3.

8^2 means 8 * 8.

(-6)^2 means (-6) * (-6).

In each case above, you see that the number that is squared is multiplied by itself.

In this case, (-4.5)^2, squaring the number -4.5, means multiply the number -4.5 by the number -4.5

(-4.5)^2 = (-4.5) * (-4.5)

Now we need to actually multiply -4.5 by -4.5

When you multiply a negative number by a negative number, the result is positive, so the product of -4.5 and -4.5 is a positive number. To find that number, you multiply 4.5 by 4.5

4.5 * 4.5 = 20.25

Therefore, (-4.5)^2 = 20.25

4 0
3 years ago
Jeff's mother gave him money. he used an equal amount of money each day. at the end of the 7th day, he was left with 1/4 of how
skelet666 [1.2K]

Jeff received 280$ from his mother

Such questions are the simplest as it needs you to just write the conditions accordingly which then simplifies and provides you the answer.

This question can be solved using two tricks which are shown below:-

Trick  1 :

1 – 1/4 = 3/4 (used for the 1st 7 days)

1/4 – 410 (used for 8th and 9th days)

(3/4)/7 ——- (1/4 – 10)/2

(3/4) x (2/7) = 3/14 ——- (1/4 – 10)

1/4 – 3/14 = (7 – 6)/28 = 1/28 ——- 10

28/28 ——- 10 x 28 =$ 280

Trick 2 :

7 days ——- 3/4

1 day ——- 3/28

2 days ——- 6/28

6/28 ——- (1/4 – 10) = 7/28 – 410

1/28 ——- 10

28/28 ——- 10 x 28 = $280

Thus Jeff received 280$ from his mother.

Learn more about simple math here :

brainly.com/question/23678

#SPJ4

4 0
2 years ago
Find the measure of arc DF (with an explanation of how to solve please!)
allochka39001 [22]

Answer:

mDF = 90°

(Assuming arc mCE is 5x + 10)

Step-by-step explanation:

When we have two chords crossing in a circle, there is a property where the angle in the cross point is equal half the sum of the corresponding arcs.

So in this case, we have:

70° = (mCE + mDF)/2

Assuming mCE is 5x + 10, we have:

70 = (5x + 10 + 11x + 2)/2

70 = (16x + 12)/2

70 = 8x + 6

8x = 64

x = 8

So the arc mDF is:

mDF = 11x + 2 = 11 * 8 + 2 = 90°

4 0
2 years ago
Would someone mind answering this?
saveliy_v [14]

Answer:

d

Step-by-step explanation:

There is not enough information to solve this question

6 0
3 years ago
Read 2 more answers
Score: 0 of 1 pt
Sholpan [36]

Answer:

26x+6

Step-by-step explanation:

because i am really smart

6 0
3 years ago
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