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Neko [114]
3 years ago
8

Waht is 4 x 5 i just learnt multipalcashin

Mathematics
2 answers:
kotykmax [81]3 years ago
8 0

Answer

20

Step-by-step explanation:

4+4=8

8+4=12

12+4=16

16+4=20

Vika [28.1K]3 years ago
6 0

Answer:

20

Step-by-step explanation:

4 + 4 + 4 + 4 + 4=20

5 + 5 + 5 + 5=20

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What does 2.8- 4.4n- 2n + 7 equal?
boyakko [2]

Answer:

2.8- 4.4n- 2n + 7 = -6.4n + 9.8

Step-by-step explanation:

combined like term:

-4.4n - 2n = -6.4n

2.8 + 7 = 9.8

so all you do is combined together and got -6.4n + 9.8

5 0
2 years ago
Read 2 more answers
What is the percent change of 36;63
STatiana [176]
First, find the difference.
63-36=27
Then, divide by the original number.
27/36=0.75
Then, put it in percentage form.
75%
7 0
2 years ago
Huilans age is three times Thomas's age. the sun of their ages is 40. what is Thomas's age?
vredina [299]

Answer:

Step-by-step explanation:

Huilan = H

Thomas = T

H = 3T

T+3T = 40(This is the sum)

4T = 40

4T/4=T

40/4=10

T=10

6 0
3 years ago
A regular pentagon has a perimeter of 5x+15 what is the length of one side
dsp73

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6 0
2 years ago
If the scientist is accurate, what is the probability that the proportion of airborne viruses in a sample of 477 viruses would d
melisa1 [442]

Answer:

0.01596

Step-by-step explanation:

A scientist claims that 8% of the viruses are airborne

Given that:

The population proportion p = 8%

The sample size = 477

We can calculate the standard deviation of the population proportion by using the formula:

\sigma_p = \sqrt{\dfrac{p(1-p)}{n}}

\sigma_p = \sqrt{\dfrac{0.8(1-0.8)}{477}}

\sigma_p = \sqrt{\dfrac{0.0736}{477}}

\sigma_p = 0.02098

The required probability can be calculated as:

P(| \hat p - p| >  0.03) = P(\hat p - p< -0.03 \ or \  \hat p - p > 0.03)

= P \bigg ( \dfrac{\hat p -p }{\sqrt{\dfrac{p(1-p)}{n}}} < -\dfrac{0.03}{0.0124}  \bigg ) +  P \bigg ( \dfrac{\hat p -p }{\sqrt{\dfrac{p(1-p)}{n}}} >\dfrac{0.03}{0.0124} \bigg )

= P(Z < -2.41) + P(Z > 2.41)

= P(Z < -2.41) + P(Z < -2.41)

= 2P( Z< - 2.41)

From the  Z-tables;

P(| \hat p - p| >  0.03) = 2 ( 0.00798

P(| \hat p - p| >  0.03) = 0.01596

Thus, the required probability = 0.01596

3 0
3 years ago
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