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# Math Problem.i need some help.please? Topic: How to write a math expression
July 19, 2019 / By Carol
Question: Its a word problem, and it says: A triangle has two sides equal in length and a third side 5in. longer than half the length of each of the other two sides. If the perimeter of the triangle is 50in, How long is each side? I just cant figure it out, the instructions say to "Write an equation, and solve" i dont just want the answer, i just want to know how to do it... thank you! -much love- Ashley  Angela | 8 days ago
So it might help you to draw a picture. A. Draw a triangle. B. First it says that 2 sides are equal in length. Say those are both equal to "x". C. The third side then says that it is equal to one half of one of the sides (x) plus 5. you can say that side is 0.5x + 5 D. Then it says that the perimeter (all the sides added together) equal 50. You can then say that 50= x + x + .5x + 5 simply that equation to say 50=2.5x + 5 E. Then just solve for x. subtract 5 from both sides then divide by 2.5. 50 -5 = 2.5x + 5 -5 45=2.5x 45/2.5=2.5x/2.5 18= x D. That, however, only gets you part of the way there. You now know how long 2 of the sides are, but you still need to know the other one. Using the expression we made above (0.5x + 5), substitute 18 in for x, then solve to find the value of the final side of the triangle. .5(18) + 5 9 + 5 14 So your answers should be: 18,18, and 14
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We found more questions related to the topic: How to write a math expression Originally Answered: Help with a math problem (distance, rate, and time problem)?
Train 1 and Train 2 V1 = Velocity of Train 1 V2 = Velocity of Train 2 D1 = Distance traveled by Train 1 D2 = Distance traveled by Train 2 V2 = V1 + 5mph D2 = 170 miles - D1 D1 = V1 * 2hours D2 = V2 * 2Hours Solve 2*V2 = 170 - 2V1 2(V1 + 5) = 170 - 2*V1 2*V1 + 10 = 170 - 2*V1 4 * V1 = 160 V1 = 40mph V2 = 40 + 5 = 45mph The 2 answers below are wrong because they are using the whole distance of 170 miles in their equation for 1 train. Neither train actually traveled 170 miles. This is a simultaneous equations problem with 4 equations and 4 unknowns. Originally Answered: Help with a math problem (distance, rate, and time problem)?
ok, enable's see: Distance = velocity * Time the 1st hour = 12 + 3 = 15 miles aside 2d Hour = 24 + 6 + 3 = 33 miles third hour = 33 + 12 + 6 fifty one miles so which you comprehend the acceptable suited answer is between 2 and 3 hours given this would be a linear equation, you could remedy it (a million,15) , (2,33) y - 15 = (33-15) (x-a million) y - 15 = 18(x-a million) y - 15 = 18x - 18 yet y = 40 5 30 = 18x -18 30+18 = 18x 40 8= 18x x = 40 8/18 x = 2 hrs and 40 minutes stable success on your very final! Wilfred
Remember that the perimeter of a triangle is calculated by: P = a + b + c Where a, b, and c are the sides of the triangle. We're given that two of the sides are equal in length. Therefore, a = b, and P = b + b + c P = 2b + c We're also given that the third side (which, in our case, is c) is 5 inches longer than half the length of the other two sides. This means c = (1/2)b + 5, since "The third side (c) is (=) 5 inches longer (+5) than half the length (1/2 * b) of the other two sides." Since P = 2b + c, we now know what c is, so P = 2b + (1/2)b + 5 But we know that P = 50, so 50 = 2b + (1/2)b + 5 You seem to genuinely want to know how to do it, so I'll stop right here and hope that this helped.
👍 60 | 👎 4 Scott
Each of 2 equal sides = x Third side = x / 2 + 5 Perimeter x + x + x/2 + 5 = 50 Multiplying both sides by 2 2x + 2x + x + 10 = 100 5x + 10 = 100 Subtracting 10 from both sides 5x = 90 x = 90/5 = 18 Third side = x/2 + 5 = 18/2 + 5 = 9 + 5 = 14 18", 18" and 14"
👍 53 | 👎 0 Originally Answered: Simple elementary math problem? + and a word problem?
n is 1 b is 3 a is 1 only 1x1 is 1 so n and a are 1. 1 times something is 3 so b is 3. nb is 3

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