Answer:
9 months
Step-by-step explanation:
$500 - $240 = $260
$260/$30 = 8.67(3s.f.) ≈ 9 months
Recheck:
Balance after 9 months = 240 + (30×9) = 240 + 270 = $510
∴ $510 > $500
Imagine the digits are A and B (for the mystery number AB)
A + B = 8 [1st equation]
AB - BA = 18
A*10 + B - 10*B - A = 18
9A - 9B = 18 / divide everything by 9
A - B = 2 [2nd equation]
If you add the two equations you get
2A = 10
A = 5
So B = 8 - 5 = 3
So the number is 53
Answer:
x = 55
Step-by-step explanation:
Since 2 sides of the triangle are congruent, both 5, then the triangle is isosceles and the 2 base angles are congruent, both x , then
x + x + 70 = 180 ← sum of 3 angles = 180°
2x + 70 = 180 ( subtract 70 from both sides )
2x = 110 ( divide both sides by 2 )
x = 55
The interior angles of a pentagon all add up to be 540°
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