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motikmotik
3 years ago
7

How do you do 20x-10y=50 10x-15y=-5 in system of equations

Mathematics
1 answer:
swat323 years ago
8 0

Answer:The point form would be (4,3) and the equation form would be x=4,y=3

Step-by-step explanation:

can I get marked brainliest

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PLEASE CHECK AND SEE IF I'M CORRECT!!! <br> CORRECT ANSWERS ONLY PLEASE!!!
jeka57 [31]
BD is right but PA is wrong, would be BD and MK.
5 0
3 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
6. Find the value of y.<br> 5<br> 16
Svetllana [295]
3.59999
or 3.6
hopefully this helps you!
4 0
2 years ago
Suppose that a company claims that its air fresheners last 23 days, on
pashok25 [27]

Answer:

95 - 23 = 17

Step-by-step explanation:

This is the answer because it is subtracted so that you get the answer

8 0
3 years ago
Find the slope of the line.
Minchanka [31]
It is 25.6802490 tell me if you got it right and pls give me a brainialist
5 0
3 years ago
Read 2 more answers
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