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4 years ago

What is the best way to do math problems. Please give me your opinion.

Mathematics

2 answers:

Anna11 [10]4 years ago

8 0

For me personally i can work nearly any equation with a calculator. definitely a good choice <span />

padilas [110]4 years ago

6 0

A combination of both
do the hard work on the calculator but write it down on paper so if you make a mistake you can still catch it
or be like me and do your math problems on your had

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SITUACION PROBLEMÁTICA 2

oee [108]

Answer: We need to support her work for at least 15 days.

Step-by-step explanation:

Juana's mother receives a daily payment of 30 soles .

She has already 120 soles.

Let x = Number of days to save at least 550 soles.

Then, Total she has after x days = 120+30x

According to the question, we have

$120+30x \geq 550\\\\\Rightarrow\ 30x\geq550-120\\\\\Rightarrow\ 30x\geq430\\\\\Rightarrow\ x\geq\dfrac{430}{30}\\\\\Rightarrow\ x\geq14.33$

i.e. minimum value for x=15

Hence, we need to support her work for at least 15 days.

6 0

3 years ago

Round to the nearest hundreds place<br> Show your work<br> 4x = 7 - 8x - 27

faltersainse [42]

Answer:

x = 5

Step-by-step explanation:

4x = 7 - 8x - 27

1) Combine like terms (7 and -27). So, 7 + (-27) = -20.

4x = 8x - 20

2) Subtract 8x from both sides of the equation. So, 4x - 8x = -4x.

-4x = -20

3) Divide both sides by -4. So, -20 / -4 = 5.

x = 5

5 0

4 years ago

Denise guessed that the elephant at the zoo weighed 10,000 pounds. It actually weighed 12,400 pounds. Yesia guessed that the hip

NeX [460]

Answer: weight of elephant has smaller percent error.

Step-by-step explanation:

Percent error = $\dfrac{|\text{estimated value -actual value}|}{\text{actual value}}]\times100$

Estimated weight of elephant = 10,000 pounds

Actual weight of elephant = 12,400 pounds

Percent error of weight = $\dfrac{|12400-10000|}{12400}\times100\%\approx19.35\%$

Estimated weight of hippopotamus = 2,500 pounds

Actual weight of hippopotamus = 3,600 pounds

Percent error of weight = $\dfrac{|2500-3600|}{3600}\times100\%\approx30.55\%$

Since 19.35 < 30.55

hence, weight of elephant has smaller percent error.

3 0

3 years ago

What is the area of the following trapezoid in the following graph (there is an attachment)

jarptica [38.1K]

Answer:

72 square units

Step-by-step explanation:

I asked my parents they agree, but i'm not sure if it's right or not.

6 0

3 years ago

Betty is making a quilt made of various patterns. She buys 3 sheets of fabric that each have an area of 30 square feet. She cuts

qwelly [4]

Answer:

She will have 12 sections per fabric and 36 sections in all

Step-by-step explanation:

Betty buy 3 fabrics of 30 ft²

If she cut each to 2/5 of 1 ft²

The she will have

30 × 2/5

= 6 × 2

= 12

She will have 12 for each fabric and for the 3 fabrics, she will have

12 × 3 = 36

3 0

4 years ago