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3 years ago

(-3/4)/=-3/4•4/3=-12/12=-1

Mathematics

1 answer:

Vaselesa [24]3 years ago

7 0

Answer: (-3/4)/=-3/4•4/3=-12/12=-1 = = 0

Step-by-step explanation:

Unary minus: -3

Multiple: the result of step No. 3 * 4

= -3

* 4

= -3 · 4

4 · 3

= -12

= -1 · 12

1 · 12

= -1

Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(-12, 12) = 12.

In words - minus three quarter multiplied by four thirds = minus one.

Compare: (the result of step No. 4) = (-1)

Unary minus: -12

= -1

Compare: (the result of step No. 6) = (-1)

Compare: (-1)

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Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 60. How old is each sister? (a) Write

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3 years ago

One positive integer is 7 less than twice another. The sum of their squares is 346. Find the integers. should be 2 answers

vovikov84 [41]

Answer:

the two positive integers are x= 15, and y = 11

Step-by-step explanation:

Let the first integer be x

Let the second integer be y

from the problem we can decode the following equations

$x=2y-7$ ---------------------------- equation 1

$x^{2} + y^{2}= 346$ -------------------------equation 2

substituting the value of x into equation 2, we have

$(2y-7)^{2} + y^{2}= 346 --------------equation 3$

expanding, we have

$4y^{2}-28y+49+y^{2}=346$

$5y^{2}-28y-297 = 0$

from this, y = 11 or y = -5.4

since our answer is a positive integer, we will have to pick the first value of y which is y = 11

substituting the value of y into equation 1, we have

$x= 2(11)-7=15$

hence x = 15

Therefore, we have x= 15, and y = 11

these are the two positive integers

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3 years ago