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jeka94
3 years ago
15

What other compatible numbers could you use for 428 and 286

Mathematics
1 answer:
kaheart [24]3 years ago
4 0
How about raising 286 up by 14 to 300 and compensating by lowering 428 by the same 14 Since I know that 14 + 14 is 28  then 28-14 is 14
So 428 - 14 = 414
So now I have 414 + 300 which I can do mentally - the answer is 714 and is also the answer to the original problem 428 + 286

Compensation works very well - bring one number up or down to a rounded number and compensate by doing the opposite to the other  - instead of 199 + 457 - try 200 + 456
Same answer and because one of the numbers is nicely rounded, it is easy to add the other. 

One more:  207 + 182  becomes 200 + 189 =389   I lowered one by 7 and raised the other one by the same 7.

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Since it's 4 questions ill give yall 50 points to whoever answers. <
CaHeK987 [17]

Step-by-step Solutions:

<u>Question 7:</u>

  • √9
  • => √3 × 3
  • => 3

<u>Question 8:</u>

  • √64
  • => √8 × 8
  • => 8

<u>Question 9:</u>

  • √4
  • => √2 × 2
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<u>Question 10:</u>

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6 0
2 years ago
Read 2 more answers
To convert 0.73 hours into minutes which ratio would you multiply by. a 1 minute/ 60 hours
Serjik [45]
60 min / 1 hour. ...
4 0
3 years ago
11. What is the length of the missing side, x?
Dimas [21]

Answer:

x = 40 in

Step-by-step explanation:

the missing angle in the triangle on the left is

180° - (74 + 51)° = 180° - 125° = 55°

the missing angle in the triangle on the right is

180° - (74 + 55)° = 180° - 129° = 51°

the 2 triangles have 3 pairs of congruent angles and are therefore congruent.

Corresponding sides and angles are then congruent

consider the corresponding sides opposite 74° , that is x and 40 in , so

x = 40 in

8 0
9 months ago
Solve for x. Round to the nearest tenth. ​
kondor19780726 [428]

Answer:

22.8

Step-by-step explanation:

a^{2} +b^{2} =c^{2} \\20^{2} +11^{2} =x^{2} \\400+121=x^{2}\\\sqrt{521} =x\\\\or\\\\22.8 = x

5 0
3 years ago
HELP ME WITH THE EQUATION!!! IF ITS CORRECT ILL GIVE BRAINIST
Andrei [34K]

Answer:

The equation would be F = C - 3m

Step-by-step explanation:

Based on the chart, the fee for each movie you rent costs 3 dollars. The F is the monthly membership fee, the m is the number of movies rented, the 3 is the fee for each movie rented, & the C is the cost.

I really hope that it helps.

3 0
2 years ago
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