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3 years ago

Please answer!!!! will make brainliest!!!

Mathematics

1 answer:

hammer [34]3 years ago

7 0

Answer:

Step-by-step explanation:

3(x+3) - 2 < 4
3x + 9 -2 < 4
3x < 4-7
3x < - 3
x < -1
x = (-oo, -1)

1 - x ≤ -1
- x ≤ -1 - 1
-x ≤ -2
x ≥ 2
x = [2, +oo)

Correct choice is B.

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Suppose M is the midpoint of line FG.

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3 years ago

Oblicz.Pamiętaj o kolejności wykonywania działań

SashulF [63]

Answer:

33.275

Step-by-step explanation:

1 step: Difference in brackets

$3.5-2\dfrac{1}{3}=3\dfrac{1}{2}-2\dfrac{1}{3}=(3-2)+\left(\dfrac{1}{2}-\dfrac{1}{3}\right)=1+\dfrac{3-2}{3\cdot 2}=1+\dfrac{1}{6}=1\dfrac{1}{6}$

2 step: $0.75\div\dfrac{1}{3}$

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3 step: $1.28\div 0.04$

$1.28\div 0.04=128\div 4=32 \ \text{Move point two decimal places}$

4 step:

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5 step:

$\dfrac{9}{4}+32-\dfrac{21}{8}+1.65=(32+1.65)+\left(\dfrac{9}{4}-\dfrac{21}{8}\right)=33.65+\dfrac{9\cdot 2-21}{8}=33.65-\dfrac{3}{8}=33.65-0.375=33.275$

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3 years ago

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aleksley [76]

Technically, this counts

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3 years ago

Read 2 more answers

Out of a sample 650 high school students, 321 take the bus to school every day. construct a 99% confidence interval for the popu

gtnhenbr [62]

A 99% confidence interval for the population mean of high school students that take the bus to school every day is b) ci=(44.34%, 54.43%)

We need to find the 99% confidence interval for the population mean of high school students that take the bus to school everyday

A confidence interval is a range of estimates for an unknown parameter. The confidence interval is calculated at the specified confidence level; the most common is the 95% confidence level, but sometimes other levels are used, such as 90% or 99%.

The confidence interval of proportions is given by:

π ± z √(π (1-π) /n)

π is the sample proportion.

z is the critical value.

n is the sample size.

For 99% confidence interval the value of z is 2.58

π = 321/650

The confidence interval is given by

=321/650 ± 2.58 √( (321/650) × [ 1 - (321/650) ] ÷ 650)

= (0.493846 ± 0.050594)

=(0.4434 , 0.5443)

=(44.34 % , 54.43 %)

Hence a 99% confidence interval for the population mean of high school students that take the bus to school every day is ci=(44.34%, 54.43%)

Learn more about confidence interval:

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2 years ago

There are 36 people waiting in line for hayride only six people can ride on each wagon if each wagon is full how many wagons are

ANEK [815]

Answer: 6 wagons will be needed

Step-by-step explanation:

36/6=6

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3 years ago

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