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klio [65]
2 years ago
15

Why is 42 x 4−2 equal to 1?

Mathematics
2 answers:
Alenkinab [10]2 years ago
4 0

Answer: I dont know, sorry.

Dovator [93]2 years ago
3 0
It doesn’t link, sorry but it’s not equal to 1 what do ever!!
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Find the value of x.
olchik [2.2K]

Answer:

x = 4

Step-by-step explanation:

In \triangle BAC, \: DE || AC

Hence, by basic proportionality theorem:

\frac{x + 2}{x}  =  \frac{3}{2}  \\  \\  \therefore \: 2(x + 2) = 3x \\ \therefore \:2x + 4 = 3x \\ \therefore \:4 = 3x - 2x \\ \therefore \:4 = x \\  \huge \red { \boxed{\therefore \:x = 4}}

7 0
3 years ago
A student used a 30% off coupon to buy a jacket. There was no tax. The student paid $67.34. What was the original price of the j
PSYCHO15rus [73]

Step-by-step explanation:

the solution is in the picture

6 0
2 years ago
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Lebron keeps track of his life relative to the year he was born . Relative to when he was born ,his brother was born in year -3
elena-s [515]

Answer:

A, because -3 is a negative integer it is to the left of zero, 7 is a positive integer is it to the right of zero.

Hope this helps <3

5 0
3 years ago
I have 10 goats, n of which are male. I need to choose 2 of them to make a casserole.
snow_tiger [21]

Answer: There are 4 male goats.

Step-by-step explanation:

We know that n of the 10 goats are male.

The probability that in a random selection, the selected goat is a male, is equal to the quotient between the number of male goats (n) and the total number of goats (10)

The probability is;

p = n/10

Now the total number of goats is 9, and the number of male goats is n -1

then the probability of selecting a male goat again is:

q = (n-1)/9

The joint probability (the probability that the two selected goats are male) is equal to the product of the individual probabilities, this is

P = p*q = (n/10)*((n-1)/9)

And we know that this probability is equal to 2/15

Then we have:

(n/10)*((n-1)/9) = 2/15

(n*(n-1))/90 = 2/15

n*(n-1) = 90*2/15 = 12

n^2 - n = 12

n^2 - n - 12  = 0

This is a quadratic equation, we can find the solutions if we use Bhaskara's formula:

For an equation:

a*x^2  + b*x + c =  0

The two solutions are given by:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

For our case, the solutions will be:

n = \frac{1 +- \sqrt{(-1)^2 - 4*1*(-12)} }{2*1 } = \frac{1+- 7}{2}

The two solutions are:

n = (1 - 7)/2 = -3    (this solution does not make sense, we can not have a negative number of goats)

The other solution is:

n = (1 + 7)/2 = 4

This solution does make sense, this means that we have 4 male goats.

5 0
3 years ago
A sprinter can run 279 feet in 9 seconds. Find the sprinter's unit rate of feet per second.
Lorico [155]
The answer is 31 feet per second :)
4 0
3 years ago
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