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erma4kov [3.2K]
2 years ago
10

Please help I’ll make you the brainiest

Mathematics
1 answer:
son4ous [18]2 years ago
6 0

Answer:

B

Step-by-step explanation:

7-3=4

4x4=16

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When 8 is subtracted from the square of a number, the result is 7 times the number.
LuckyWell [14K]

Answer:

8

Step-by-step explanation:

x^2 - 8 = 7x

x^2 - 7x - 8=0

(x - 8)(x + 1)=0

x - 8= 0   x + 1=0

x=8           x= -1

8 is the positive solution

4 0
3 years ago
A car is 210 inches long. A trubkis 60% longer than the car. How long is the truck ?
DIA [1.3K]
It’s should be about 320
7 0
3 years ago
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Find the mean and the median of the data set..... 200,167,185,212,195,193,188,140
astraxan [27]
You Will Add Up All The Number Then Divide By The Total Number You Have In All
The Mean Is 185
You Put All The Number In Order For The Median 
140,167,185,188,193,195,200,212
So You Have Two Number Which Are 188 and 195 
You Will Add 188 + 195=383
Now You Divide 383 By 2 Which Is 191.5
4 0
3 years ago
Solve the quadratic equation. (x + 6)2 = 49
kykrilka [37]

Answer:

C

Step-by-step explanation:

To solve, use inverse operations:

(x+6)^2=49\\\sqrt{(x+6)^2} =\sqrt{49} \\x+6=+/-7

Now we solve for both +/- 7.

x+6=7

x=1

x+6=-7

x=-13

3 0
3 years ago
A recent survey found that 70% of all adults over 50 wear
lubasha [3.4K]

Answer:

There is an 84.97% probability that at least six wear glasses.

Step-by-step explanation:

For each adult over 50, there are only two possible outcomes. Either they wear glasses, or they do not. This means that we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem we have that:

n = 10, p = 0.7

What is the probability that at least six wear glasses?

P(X \geq 6) = P(X = 6) + `P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10) = 0.8497

There is an 84.97% probability that at least six wear glasses.

5 0
3 years ago
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