Ask question

Ask question

All categories

2 years ago

7

PLEASE HELP!!! SILL GIVE BRAINLIEST (2-52)

2 answers:

stellarik [79]2 years ago

7 0

Answer:

7x6+5=47

6x5+7=37

7x5+6=41

frozen [14]2 years ago

7 0

Answer:

I also answered look at your last qestion

Step-by-step explanation:

You might be interested in

What is the sum of the infinite geometric series?

nikitadnepr [17]

An infinite geometric series is the sum of an infinite geometric sequence . This series would have no last term. The general form of the infinite geometric series is a1+a1r+a1r2+a1r3+... , where a1 is the first term and r is the common ratio. We can find the sum of all finite geometric series.

On what I’ve researched :)

3 0

3 years ago

In Pennsylvania the average IQ score is 101.5. The variable is normally distributed, and the population standard deviation is 15

blsea [12.9K]

Answer:

We conclude that the Pennsylvania school district have an IQ higher than the average of 101.5

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu > 101.5$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.96$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Thus, we conclude that the Pennsylvania school district have an IQ higher than the average of 101.5

5 0

3 years ago

How to write 40,257 in standard form

Vika [28.1K]

40.257 i believe......

7 0

3 years ago

Read 2 more answers

A explanation would help very much

Leni [432]

Answer:

x = 14

y = 40

Step-by-step explanation:

3y+8 = 128

3y = 120

y = 40

45/20=2.25 (scale factor)

5x-25 = 2.25(2x-8)

5x-25 = 4.5x - 18

.5x = 7

x=14

4 0

3 years ago

Ruby uses 3/8 of a cup of blueberries for her smoothie. If she has 4

Artyom0805 [142]

Answer:

10 smoothies

Step-by-step explanation:

because each 3/8th yields 2 smoothies and the leftovers from each cup made 2 more.

3 0

2 years ago