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Dovator [93]
3 years ago
9

There are 23 classes in the fourth grade. Each grade has 21 students. Write a number sentence that will provide a reasonable est

imate for the number of students in the fourth grade. Explain how you found your estimate.
Mathematics
1 answer:
lapo4ka [179]3 years ago
6 0
23 can round to 20 and 21 can also round to 20 so all u do is 20x20=400 so 400 is your estimated answer
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The olympics are held every four years. In 2016, the XXXI olympiad were held in Rio de Janeiro,Brazil. Determine the year of the
Anna007 [38]

Answer:

First Olympic held in year 1896.

Step-by-step explanation:

Number of Olympiad held in Rio = XXXI = 31st

Difference of years in two consecutive Olympiads = 4 years

Number of years spent in 31 Olympiads can be calculated by,

Number of years spent = (n - 1)d

Here n = number of Olympiads held

d = difference between two consecutive Olympiads

Number of years spent till 31st Olympiads = (31 - 1)×4

                                                                      = 120 years

Therefore, 1st Olympiad held in the year = 2016 - 120

                                                                   = 1896

6 0
3 years ago
Kiera has $20 in a savings account. The interest rate is 5%
Anuta_ua [19.1K]

Calculation:

First, converting R percent to r a decimal

r = R/100 = 5%/100 = 0.05 per year,

then, solving our equation

I = 20 × 0.05 × 2 = 2

I = $ 2.00

The simple interest accumulated

on a principal of $ 20.00

at a rate of 5% per year

for 2 years is $ 2.00.

8 0
3 years ago
What is the distance between -13 and 13
Andre45 [30]

Answer:

26

Step-by-step explanation:

-13+13=0

0+13=13

13+13=26

4 0
3 years ago
What else would need to be congruent to show that JKL= MNO by AAS?
taurus [48]
Answer: Choice B) Angle L = Angle O

---------------------------------------------------
---------------------------------------------------

If we know that Angle L is congruent to Angle O, then we can use the AAS (angle angle side) congruence property. We have one pair of angles marked by the square marker (angle J and angle M). So they are congruent angles. We have a pair of congruent sides JK = MN = 3. So we're just missing a pair of angles. 

Note: The answer is NOT angle K = angle N because this would mean ASA would be used instead of AAS. The order of the letters is important as it establishes how the sides and angles relate. With ASA, the side is between the angles. With AAS, the side is not between the angles. 

3 0
3 years ago
Read 2 more answers
Vincent earns $258 on Monday, $105 on Tuesday, and $312 on Wednesday. He spends $299 on Thursday. How much money does he have le
Inessa05 [86]
Estimated amount : 375.

Exact amount : 376.
3 0
4 years ago
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