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e-lub [12.9K]
3 years ago
13

Use rounding to estimate

Mathematics
2 answers:
poizon [28]3 years ago
7 0
3. my answer I got was 6.53. I think it rounds to 7

Artyom0805 [142]3 years ago
6 0
First use addition, add everything up so...
First question is asking: 2.57+0.14= 2.71. To round it, see the 7, is it greater than 5? If yes then the 2 will be change to 3. So it's 3 as your answer.
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Lerok [7]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Solve x42=37 x 42 = 3 7 using two different strategies. Explain each strategy.
Dafna11 [192]

Given equation : \frac{x}{42}=\frac{3}{7}.

Strategy 1: We can cross mutiply both sides remove fraction form.

On cross multiplication, we get

x * 7 = 3 * 42

7x = 126.

Dividing both sides by 7, we get

<h3>x = 18.</h3>

Strategy 2: We can find least common denominator(lcd) of both sides and multiplying both sides by that lcd to get rid denominators from both sides.

LCD of 42 and 7 is 42.

Therefore, multiplying both sides by 42, we get

42\times \frac{x}{42}=42\times\frac{3}{7}

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4 0
3 years ago
a scanner scanned 72 photos in 8 minutes if it scans photos at a constant rate it can scan ___ photos in 23 minutes
Leni [432]
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6 0
3 years ago
Read 2 more answers
The difference of two sample means is 22, and the standard deviation of the difference of the sample means is 10. The difference
taurus [48]

Answer:

The 95% confidence interval for the difference of the two populations means is ( 2.4, 41.6)

Step-by-step explanation:

Confidence intervals are usually constructed using the formula;

point estimate ± margin of error

In this question we are required to construct a 95% confidence interval for the difference of two populations means. The point estimate for the difference of two population means is the difference of their sample means which in this case is 22.

Assuming normality conditions are met, since we have no information on the sample sizes, the margin of error will be calculated as;

margin of error = z-score for 95% confidence * standard deviation of the difference of the sample means

The z-score associated with a 95% confidence interval is 1.96

The standard deviation of the difference of the sample means is given as 10

The 95% confidence interval for the difference of the two populations means is thus;

22 ± 1.96(10) = 22 ± 19.6 = ( 2.4, 41.6)

8 0
3 years ago
What is an angle that is adjacent to DEA?
White raven [17]

Answer:

CED or AEB

Step-by-step explanation:

adjacent angles share the same vertex and one side so it will be either CED or AEB

5 0
2 years ago
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