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Svetach [21]
2 years ago
10

What is x + 3 when x equals 6?​

Mathematics
2 answers:
andriy [413]2 years ago
8 0

Step-by-step explanation:

x + 3=9

6+3=9

replace the X with the six

ziro4ka [17]2 years ago
6 0

Answer:

9

Step-by-step explanation:

x + 3

6 + 3 = 9

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The number of squares that are required to fill a rectangle of 512 cm by 108 cm, if each square of length 8 cm is _____________.
expeople1 [14]

Answer:

864

Step-by-step explanation:

512÷8=64

108÷8=13.5

64×13.5=864

8 0
3 years ago
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. A random sample of 100 children with working mothers showed that they were absent from school an average of 6 days per term wi
erica [24]

Answer:

a) The equation is:

Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples

b) The 98% confidence interval = (5.62784, 6.37216)

Step-by-step explanation:

a. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. (10 points)

Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples

b. Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. (10 points)

Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples

Mean = 6 days

Standard deviation = 1.6 days

Number of samples = 100

Z score of 98% confidence interval = 2.326

Confidence interval = 6 ± 2.326 × 1.6/√100

= 6 ± 2.326 × 1.6/10

= 6 ± 0.37216

= 6 - 0.37216

= 5.62784

6 + 0.37216

= 6.37216

Therefore, the 98% confidence interval = (5.62784, 6.37216)

6 0
2 years ago
Can anyone solve this? I'm having a hard time
bearhunter [10]
A good app that would help you with math is photomath
8 0
3 years ago
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The speed of sound in air is 340 m/s. How far , in meters, would a sound of wave travel on 7 seconds?​
Rasek [7]

Answer:

2 380m

Step-by-step explanation:

very simple just multiply 7×340

4 0
2 years ago
A rectangular prism has a length of 10m, a height of 2m, and a width of 5m. What is its volume, in cubic m?
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50 meters cubed because you have to multiple (2()5)(10)
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2 years ago
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