9514 1404 393
Answer:
(x, y) = (8, 2)
Step-by-step explanation:
The relevant equations are ...
3x -y = 22
x +2y = 12
__
We can eliminate y by adding twice the first equation to the second.
2(3x -y) +(x +2y) = 2(22) +(12)
7x = 56
x = 8
Substituting into the first equation gives ...
3(8) -y = 22
y = 24 -22 = 2
The first number is 8; the second number is 2.
Step-by-step explanation:
the first question
x²+x+5
when x is -4
(-4)²+(-4)+5
16-4+5
12+5
17
hope this was helpful
<span>Surface Area =<span> (2 • <span>π <span>• r²) + (2 • <span>π • r • height)
</span></span></span></span></span>
<span>(2 • <span>π <span>• r²) is surface area of the "ends"
</span></span></span>
<span>(2 • <span>π <span>• r • height) is lateral area
</span></span></span>
<span>Lateral Area = 2 * PI * 2 * 7
</span>
<span>Lateral Area =28 * PI =
</span>
<span><span><span>87.9645943005 square inches</span></span></span><span><span><span>
</span>
</span>
</span>
Answer is B
Answer:
x=1
Step-by-step explanation:
R + s + t
Plug in the values.
r = 26
s = -12
t = -8
r + s + t
26 + (-12) + (-8)
26 - 12 - 8
14 - 8
6
Remember these rules:
a + (+b) = a + b
a + (-b) = a - b
a - (+b) = a - b
a - (-b) = a + b