Answer:
10 = 74°
7 is alternate to 12 so 12 is 74°
<em><u>The question is the base of the triangle, so we use the formula : b²=c²–a²</u></em>
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2x - 2y = -12
4x - 7y = -15
Multiply the first equation by -2 to make the 2x the opposite of 4x:
2x - 2y = -12 x -2 = -4x + 4y = 24
Now add this to the second equation:
-4x + 4y = 24 + 4x - 7y = -15:
-3y = 9
Divide both sides by -3
y = 9 / -3
y = -3
Now you have Y, replace y in one of the equations and solve for x:
2x - 2(-3) = -12
2x +6 = -12
Subtract 6 from both sides:
2x = -18
Divide both sides by 2:
x = -18 /2
X = -9
Check:
2(-9) - 2(-3) = -12
-18 + 6 = -12 TRUE
4(-9) - 7(-3) = -15
-36 +21 = -15 TRUE
X = -9, y = -3
(-9,-3)
Answer:
$39.56
Step-by-step explanation:
If he gets a 25% discount, then he is basically buying the sleeping bag for 75% (75%=0.75) of the original price.
$52.75x0.75
=$39.5626
≈$39.56
(Since money only goes to the hundredths place it is rounded)
He will pay $39.56 for the sleeping bag.
