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polet [3.4K]
3 years ago
14

Explain how u can use estimation to check that ur answer is reasonable

Mathematics
1 answer:
Pie3 years ago
6 0
Do the opposite of the problem
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If you mow 24 lawns and earn 10.50 for each lawn,your total earing are?
Sladkaya [172]
If one lawn is 10.50, then to find 24 lawns you times it by the earnings of one lawn (i.e. 10.50)
The sum would be: 10.50 x 24
The answer to that would be 252.00.
(Remember to add in the currency sign in front of the answer (eg. £ $ etc)
7 0
3 years ago
Read 2 more answers
Someone plz help on # 15 (idk what to do) :/
aleksklad [387]

Answer:

2x-5= -20

move -5 to the other side

sign changes from -5 to 5

2x-5+5= -20+5

2x= -15

divide by 2 for both sides

2x/2= -15/2

cross out 2 and 2, divide by 2 and 2 and then becomes x

x= -15/2

4 0
3 years ago
Find the value of x for which ABCD must be a parallelogram.
Inessa [10]
Hey there!

You can tell that the two angles are congruent because of the arc. So make the two angles each other.
3x-17=25-3x. Add 3x to each side. You get 6x-17=25. Add 17 to each side to get 6x=42. Divide each side by 6. You get x=7. So the value of x would be 7.

I hope this helps!
3 0
3 years ago
5x = -25 what is the answer of x
Sliva [168]

Answer:

x= -5

Step-by-step explanation:

just use a calculator

5 0
3 years ago
The method of writing a number with a mixed decimal multiplied by a power of ten us called what
mario62 [17]
I believe its an exponent. 
3 0
3 years ago
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