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Doss [256]
3 years ago
5

A woman is twice as old as her daughter. Twenty years ago, she was four times as old as he daughter. How old are they now? (i do

n’t get this one cuz it’s subtracting instead of adding and it made me confuzzled)
Mathematics
1 answer:
AysviL [449]3 years ago
4 0
So for this, you might want to set up some equations.

The mom's variable is m and the daughter's is d.  

So now is it m=2d

And twenty years ago it was m-20=4(d-20)  which is the same as m-20=4d-80.

Simplify so it is m=4d-60. Now, plug it in as m in the first equation. 

4d-60=2d           2d=60        d=30  

Now, we know that the mom must be 60 and the daughter 30 years old.
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$3.00 marked up 72%<br><br>(please show your work!!)<br><br>thank you❤️❤️​
Daniel [21]
<h3>Answer:  $5.16</h3>

==================================================

Work Shown:

72% = 72/100 = 0.72

72% of $3.00 = 0.72*3.00 = 2.16

The price increases by $2.16 to get the final answer of 3.00+2.16 = 5.16 dollars

-------

We can find this answer through this alternative route:

1.72*3 = 5.16

The multiplier 1.72 represents an increase of 72% since 1.72 = 1 + 0.72 = 100% + 72% = 172%

7 0
2 years ago
Read 2 more answers
What is equivalent to the square root of -27
lions [1.4K]
For the square root of a negative number, you would have to get into imaginary numbers. If you haven't learned about it yet, then the answer would be no real solutions. But if you have, here's how to solve it:

First, identify that 9 x 3 = 27. To after taking the square root, you will get 3√3 (Since the square root of 9 is 3 and there's no square root of 3, so leave it in the √)

However, since it is a negative number, you will have to include the letter i in the answer. i represents the imaginary part of it since you can't have a negative number in the square root.

So your answer will look like 3i√3.
3 0
3 years ago
Plz help theses are exponents
ohaa [14]
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                            10

for 34 its     2
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3 0
3 years ago
Jerry is trying to earn $209 for some new video games. If he charges $47 to mow a lawn, how many lawns will he need to mow to ea
Helen [10]
At least 5. because 47x4=188 which isn’t enough money, and 47x5=235, which goes over but you have to have more money than less money
6 0
3 years ago
The perimeter of a​ standard-sized rectangular rug is 2828 ft. the length is 22 ft longer than the width. find the dimensions.
o-na [289]
X + x + 22 + x + x + 22 = 2828
4x + 44 = 2828
4x = 2784
x = 696 ft
(x + 22) = 718 ft
3 0
3 years ago
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