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kramer
4 years ago
14

Find two numbers whose square increased by 15 equals 8 times the number.

Mathematics
1 answer:
Alex4 years ago
5 0

Answer:5 and 3

So we let the number take the letter b, anc the expression of the question is:

b^2+15=8×b.....so

b^2+15=8b

Then we take the 8b to the other side of the equal sign so that it becomes...

b^2+15-8b=0

Hence it becomes a quadatic equation following the principle ax^2+bx+c where x is the unknown...

From there we work out to get two different numbers...either b-5=0

b=5

Or b-3=0

b=3

So the two numbers are 5 and 3

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The length of shoes is 25 centimeters. how long is the shoe meters?
OlgaM077 [116]

Answer:

The shoe is 0.25 or 1/4 meters long.

Step-by-step explanation:

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3 years ago
Dean and Lisa both found deals online for movie tickets. Dean bought 4 movie tickets for $39.80. Lisa bought 6 movie tickets for
lara [203]

Answer:

2.1$

Step-by-step explanation:

46.50/6 = 7.75

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8 0
3 years ago
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Penn draws a triangle with one 90 degree angle. What could be the measures of the other two angles in penn’s triangle?
stellarik [79]

Answer:

both 45 degrees

Step-by-step explanation:

90 + 45 + 45 = 180 degrees

Hope this helps!

4 0
3 years ago
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Predict the number of times Randy will roll a number cube that is not a 2 if he rolls a standard die 72 times.
4vir4ik [10]
A number cube has 6 probable possible sides: 1,2,3,4,5,6. These are all equally probable. The chance of rolling 2 is 1/6, the chance of rolling something other than 2 is 5/6.

If Randy rolls 72 times, we should view the probability out of 72, so we should convert 5/6 like this:
6x12=72 (Possibility)
5x12=60 (Probability)

Your answer:
P(1,3,4,5,6) = 60/72
3 0
3 years ago
HELP PLEASE! PRE-ALGEBRA!
serious [3.7K]

Answer:

Triangle ABC is similar to triangle A prime B prime C prime., because Triangle A prime B prime C prime. is obtained by dilating Triangle ABC. by a scale factor of 1 over 2. and then rotating it about the origin by 180 degrees

Step-by-step explanation:

Step 1: Dilation by a scale factor of 1/2.

A point (x, y) is sent to (1/2 x, 1/2 y).

A(2, 2) ---> (1, 1)

B(2, 10) ---> (1, 5)

C(8, 12) ---> (4, 6)

Step 2: Rotate about the origin 180 degrees

A point (x, y) is sent to (-x, -y).

(1, 6) --->  A'(-1, -1)

(1, 5) --->  B'(-1, -5)

(4, 6) ---> C'(-4, -6)

6 0
3 years ago
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