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Masteriza [31]
2 years ago
15

Equation of elimination method 4a+b=28 a+4b=-8

Mathematics
1 answer:
Vilka [71]2 years ago
6 0
Download an app called Photomath then it will answer it for you with work and explaining
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What is the probability of landing on an even number? (Write your final answer as a percentage.)
mamaluj [8]

Answer:

There are six numbers and only two ( 2, and 4) are even. The probability of landing on an even number is 2/6 = 1/3, but the probability of landing on an odd number is 4/6 = 2/3.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Finish solving the system of equations –9.5x – 2.5y = –4.3 and 7x + 2.5y = 0.8 using the linear combination method. 1. Determine
mars1129 [50]

Answer:

Step-by-step explanation:

The given equations are:

-9.5x – 2.5y = –4.3                    (1)

and 7x + 2.5y = 0.8                  (2)

Adding equation (1) and (2) together, we get

-9.5x-2.5y+7x+2.5y=-4.3+0.8

⇒-2.5x=-3.5

⇒x=1.4

Now, substitute the value of x=1.4 in equation (1),

-9.5(1.4)-2.5y=-4.3

⇒-13.3-2.5y=-4.3

⇒-13.3+4.3=2.5y

⇒-9=2.5y

⇒y=-3.6

Thus, the value of x and y are 1.4 and -3.6 respectively.

7 0
3 years ago
Read 2 more answers
Is that correct ????
Travka [436]
Yes I believe it is :)
7 0
3 years ago
1500 people to part in a walkathon. 450 of them were school children. The rest are adults. What percentage of the participants w
Bas_tet [7]
70% of the people were adults 

First you subtract 1500-450 = 1050
Then you divide 1050/1500 = .7

5 0
3 years ago
Read 2 more answers
If you get a sneak peak at the salary list of your job and realize you are in the lowest bracket, which is the lowest 1%, what i
hoa [83]

Answer:

z=-2.33

And if we solve for a we got

a=48000 -2.33*5500=35185

And for this case the answer would be 35185 the lowest 1% for the salary

Step-by-step explanation:

Let X the random variable that represent the salary, and for this case we can assume that the distribution for X is given by:

X \sim N(48000,5500)  

Where \mu=48000 and \sigma=5500

And we want to find a value a, such that we satisfy this condition:

P(X>a)=0.99   (a)

P(X   (b)

We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.01 of the area on the left and 0.99 of the area on the right it's z=-2.33. On this case P(Z<-2.33)=0.01 and P(z>-2.33)=0.99

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-2.33

And if we solve for a we got

a=48000 -2.33*5500=35185

And for this case the answer would be 35185 the lowest 1% for the salary

7 0
3 years ago
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