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anyanavicka [17]
3 years ago
7

To solve the system of equations below, chen isolated x2 in the first equation and then substituted it into the second equation.

what was the resulting equation?
Mathematics
2 answers:
Ann [662]3 years ago
8 0
Im pretty sure it should be 

25-y^2/16 -y^2/9=1
kakasveta [241]3 years ago
8 0

Answer:

The answer is : 16-y^2 divided by or over 4 minus y^2 divided by or over 25 =1

This is the right answer, I am 100% sure, hope this helps!

Step-by-step explanation:


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A metal washer is made by cutting out a circle 13.2 mm in diameter from a larger circle. To the nearest tenth, what is the area
Lana71 [14]
The area of the washer will be the area of the smaller circle SUBTRACTED from the area of the larger circle.

Area of a circle = pi * r^2 where r is your radius (which is half the diameter).
Larger circle area = pi *(diameter/2) ^2.
Smaller circle area = pi * (13.2/2)^2 = pi * 6.6^2 = 136.8484....

So...the area of the washer = larger circle area - 136.4848...
5 0
3 years ago
Annual snowfall in Anchorage, Alaska, is normally distributed with a mean height of 76 inches and a standard deviation of 4.7 in
lukranit [14]

Answer:

67.75%

Step-by-step explanation:

Given:

Given that:

µ = 76 ; σ = 4.7

P(x < 80.7) - P(x < 71.4)

Obtain the standardized score, Z ; x = 71. 4

Zscore = (x - μ) / σ

P(x < 71.4) = (71.4 - 76) / 4.7

P(x < 71.4) = - 4.6 / 4.7

P(x < 71.4) = - 0.9787

P(z < 0.9787) = 0.16386

x = 80.7

P(x < 80.7) = (80.7 - 76) / 4.7

P(x < 80.7) = 4.7 / 4.7

P(x < 80.7) = 1

P(z < 1) = 0.84134

0.84134 - 0.16386 = 0.67748 = 67.748% = 67.75%

6 0
2 years ago
One foot is equal to 12 inches. The function I(f) takes a length in feet (as input) and returns a length in inches (as output).
Delicious77 [7]
You need to substitute the number 6 into the function. The output would be 72, because when l(6) = 12(6), you would get l(6) = 72. 
8 0
3 years ago
What is the answer to this question?
kirza4 [7]
I hope this helps you

4 0
3 years ago
Question 1
yaroslaw [1]

Answer:

sorry but i need some points right now so just ignore this

Step-by-step explanation:

8 0
3 years ago
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