Answer:
$26
Step-by-step explanation:
15+15 +30
30% of 20 is 6
add the tax and tip to the initial $20 and you have $26
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Define x :
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Let the two digit number be 10x + y.
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Construct Equation :
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<span>Four times the units digit is six less than twice the tens digit
</span>⇒ 4y = 2x - 6
⇒2y = x - 3
⇒ x = 2y + 3
<span>The number is nine less than three times the number obtained by reversing the digits.
</span>⇒10x + y = 3(10y + x) - 9
⇒ 10x + y = 30y + 3x - 9
⇒ 7x = 29y - 9
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Solve for x and y :
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x = 2y + 3 ----------------------- (1)
10x = 29y - 9 ------------------- (2)
Sub (1) into (2) :
7(2y + 3) = 29y - 9
14y + 21 = 29y - 9
15y = 30
y = 2 ------------------- Sub into (1)
x = 2(2) + 3
x = 7
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Find the number:
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Number = 10x + y = 10(2) + 7 = 27
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Answer: The 2-digit number is 27.
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1 1/10
Step-by-step explanation:
Answer:
80 yards2
Step-by-step explanation:
Area = l × w
= 16 × 5
= 80 yards2