Answer:
So, you just end up plugging in your numbers.
y = 28 - 3(1)
y = 28-3
y = 25
Y = 28 - 3(3)
y = 28 - 9
y = 19
y = 28 - 3x
y = 28 - 3(4)
y = 28 - 12
y = 16
y = 28 - 3x
y = 28 - 3(6)
y = 28 - 18
y = 10
Step-by-step explanation:
7a + 10 = 2a subtract 2a from both sides
-2a -2a
5a + 10 = 0 subtract 10 from both sides
-10 -10
5a = -10 then divide both sides by 5
/5 /5
a = - 2
Answer:
y = 20
Step-by-step explanation:
Since AB and AC are congruent then the triangle is isosceles, thus
∠B = ∠C = 25°
To find ∠A subtract the sum of the 2 angles from 180°
∠A = 180° - (25 + 25)° = 180° - 50° = 130°, thus
3y + 70 = 130 ( subtract 70 from both sides )
3y = 60 ( divide both sides by 3 )
y = 20
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