9514 1404 393
Answer:
(x, y) = (3, 7)
Step-by-step explanation:
If you divide the second equation by 2, it becomes ...
-x +2y = 11
Adding this to the first equation gives you the value of y:
(x -y) +(-x +2y) = (-4) +(11)
y = 7 . . . . . . . . simplify
The first equation can be rearranged to give an expression for x:
x = y -4
x = 7 -4 = 3
Then the solution is seen to be (x, y) = (3, 7).
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Personally, I like a graphing calculator for a quick and easy solution to many linear systems. (If the solutions are non-integers, it may not be so helpful.)
Answer:
Q19 - x = 7
Q20 - x = 24
Step-by-step explanation:
Q19.
75 + x + 8 = 90°
83 + x = 90°
x = 90 - 83
<u>x = 7</u>
<u>{</u>CHECK: 75 + 7 + 8 = 90°<u>}</u>
<u></u>
Q20.
3x - 6 + x = 90°
4x - 6 = 90°
4x = 96
x = 96 / 4
<u>x = 24</u>
<u>{</u>CHECK: 3(24) - 6 + 24 = 90°<u>}</u>
<u></u>
<em>hope this helps...</em>
<em>have a great day ahead ;)</em>
Answer:
x = 17 / sqrt (2)
Step-by-step explanation:
first we have to notice that we have a right triangle, this means we can apply Pythagoras
h^2 = c1^2 + c2^2
then we just have to put the values we have and solve the equation
17^2 = x^2 + x^2
289 = 2(x^2)
289/2 = x^2
√289/2 = x
√289 / √2 = x
17 / √2
17 / sqrt (2)
<span>the probability of drawing a blue marble at random is 5/20 = 1/4
answer
1/4
hope it helps</span>
Hello,
The answer is option A "<span>circumference".
Reason:
</span><span>circumference = pi * diameter
</span>If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit
