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natima [27]
2 years ago
13

Carlos spent 1 1/4 hours doing his math homework. He spent 1/4 of his time practicing his multiplication facts.How many hours di

d Carlos spend practicing his multiplication facts?
Mathematics
2 answers:
lora16 [44]2 years ago
6 0

11/4 = 2 hours and 45 minutes

1/ 4 = 0.25 hour = 15 minutes

so he studied for 2 hours and 30 minutes and practiced for 15 minutes....total time = 2 hours and 45 minutes.

hope it helped !

tamaranim1 [39]2 years ago
3 0
Idk think its 10/4 and simplfy it to 1 and 2/4 1 2/4
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Find the measures of an interior angle and an exterior angle of a regular 16-gon
Anastasy [175]

Answer:

2520°

Step-by-step explanation:

The sum of the angles in any triangle is 180°

shape. sides. triangles. sum int angles.

triangle. 180×1=180°

quad. 180×2=360°

pentagon. 180×3=540°

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7 0
3 years ago
A bag contains eight yellow marbles, nine green marbles, three purple marbles, and five red marbles. Two marbles are chosen from
Kryger [21]

Answer:

The expression would give the probability that one marble is yellow and the other marble is red is,

P(Y\cdot R\ And\ R\cdot Y)=P(Y)P(R)+P(R)P(Y)

Step-by-step explanation:

A bag contains eight yellow marbles, nine green marbles, three purple marbles, and five red marbles. So in total there are 25 marbles.

Hence,

Probability of getting yellow ball = P(Y)=\dfrac{8}{25}

Probability of getting red ball = P(R)=\dfrac{5}{25}

Probability that one marble is yellow and the other marble is red is,

P(Y\cdot R\ And\ R\cdot Y)=P(Y)P(R)+P(R)P(Y)=\dfrac{8}{25}\cdot \dfrac{5}{25}+\dfrac{5}{25}\cdot \dfrac{8}{25}=0.128

8 0
2 years ago
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sergiy2304 [10]

Answer:

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Step-by-step explanation:

Let s represent the son's age now. Then s+32 is the father's age. In 4 years, we have ...

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  5s +20 = s +36 . . . . . eliminate parentheses

  4s = 16 . . . . . . . . . . . . subtract s+20

  s = 4

The son is now 4 years old; the father, 36.

_____

<em>Alternate solution</em>

In 4 years, the ratio of ages is ...

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The difference of their ages at that time is 5-1 = 4 "ratio units". Since the difference in ages is 32 years, each ratio unit must stand for 32/4 = 8 years. That is, the future age ratio is ...

  father : son = 40 : 8

So, now (4 years earlier), the ages must be ...

  father: 36; son: 4.

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UkoKoshka [18]

Answer:

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Step-by-step explanation:

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