3 years ago

Simplify (5x2 + 3x + 4) + (5x2 + 5x - 1).

Mathematics

1 answer:

marishachu [46]3 years ago

5 0

23+8X is the answer to this problem

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Find the weighted average of a data set where 20 has a weight of 3, 40 has a weight of 5, and 50 has a weight of 2.

Citrus2011 [14]

The weighted average of a data set is 36.

Here,

Given data set;

20 has a weight of 3, 40 has a weight of 5, and 50 has a weight of 2.

We have to find the weighted average of a data set.

What is Weighted Average?

Weighted average is a calculation that takes into account the varying degrees of importance of the numbers in a data set.

Now,

Given data set;

20 has a weight of 3, 40 has a weight of 5, and 50 has a weight of 2.

The weighted average is given by the formula;

$x = \frac{f_{1} x_{1} + f_{2} x_{2}+ f_{3} x_{3}+ ...... f_{n} x_{n}}{f_{1} +f_{2} + f_{2}}$

Hence,

The weighted average of a data set;

$x = \frac{20*3+40*5+50*2}{3 +5+ 2}$

$x = \frac{360}{10} = 36$

Hence, The weighted average of a data set is 36.

Learn more about the weighted average visit:

brainly.com/question/18554478

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3 0

2 years ago

A fair six-sided dice is thrown once. what is the probability of a 3 showing on the dice. A=1/6 B=1/2 C=6% D=1/3 E=1:7

goblinko [34]

Answer : 1/2

The probability of a 3 showing on a six-sided dice is 3/6 = 1/2

5 0

3 years ago

Read 2 more answers

Traveling with the current, a boat can travel 48 miles in 3 hours. Against the current, it takes 6 hours to go the same distance

drek231 [11]

Answer:

Step-by-step explanation:

8 0

3 years ago

Help me with this!! Will mark Brainliest ❤️

gizmo_the_mogwai [7]

Answer: the length of Q&R is 1 inch

Step-by-step explanation: Plz make brainliset

4 0

3 years ago

What is the multiplicative rate of change of the exponential function shown on the graph? 1 4

marta [7]

The answer:
the main formula for computing the multiplicative rate of change is given by:

Mutiplicative Rate of Change = [f(x2)/f(x1)] / (x2 -x1)
this formula can be written as
[f(x2)/f(x1)] / (x2 -x1) = [f(x2) * (x2 -x1) /f(x1)]

for example we can take (x1, f(x1))= (0, 2) and (x2, f(x2))= (1, 5)
therefore,
Mutiplicative Rate of Change = [5/2] / (1-0)= 5/2= 2.5

the answer is 2.5

6 0

3 years ago