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oksian1 [2.3K]
3 years ago
11

Average for 1.90 7.99 4.33 5.21

Mathematics
1 answer:
Arturiano [62]3 years ago
4 0
(1.90 + 7.99+ 4.33 + 5.21) ÷ 4

answer = 4.8575
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What would be the best first step in solving this system?​
Setler79 [48]

Answer:

B. substitute for X in first equation

3 0
3 years ago
One number is nine more than the other. Their sum is 33. Find the numbers. (Enter your answers as a comma-separated list.)
Bas_tet [7]

Answer:

The numbers are 12, 21.

Step-by-step explanation:

x+(x+9)=33

x+x+9=33

2x+9=33

2x=33-9

2x=24

x=24/2

x=12

--------

x+9=12+9=21

Please mark me as Brainliest if you're satisfied with the answer.

5 0
3 years ago
Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea
Anika [276]

Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with

mean \mu = 4 and standard deviation  \sigma = 0.78

If the company wishes to replace no more than 10% of the printers.

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Solution :

Using Z- table,  

Z value corresponding to 10% or 0.10 = -1.28.

Applying z-score formula,

z=\frac{x-\mu}{\sigma}

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x=(z\times \sigma)+\mu

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Therefore, About 3 years Speedy Jet printers be guaranteed.

8 0
3 years ago
I just need examples of these things, I have to make my own problems and solve them:
poizon [28]
1) x+17=20
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2) x/4=20
x/30=2

3) 4(x+5)=40

4) x+3.2=6

5) A pizza place sells pizza for $5 per box. If I had $20 how many pizzas can I buy in all? (5x=20)

Hope this helps! Have a wonderful day.
6 0
3 years ago
A 4.3 ounce tomato has about 24 calories. How many calories are in one ounce?
solniwko [45]

there are 7.8 calories in a ounce tomato


3 0
3 years ago
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