All categories

4 years ago

Determine the value of X that makes the following equation true

Mathematics

1 answer:

valentinak56 [21]4 years ago

5 0

What you want to do is cross multiply so you get 5(x+4)=7(3x+28) then you distrubute the 5 and then you distribute the 5 and the 7 to the number in the parentheses 5x+20=21x+196
subtract 5x on both sides to get 20=16x+196 then you subtract 196 on both sides to get -176=16x last what you want to do is divide 16 on both sides to get x=-11

You might be interested in

(sin30°+cos30°)(sin30°-cos30°)

LUCKY_DIMON [66]

in decimal formation it is -0.5 and in fraction -1/2

8 0

3 years ago

Suppose that you have the option to buy an item with either cash or credit. under which condition would you use credit?

Norma-Jean [14]

If you want to build a good credit score

8 0

4 years ago

Read 2 more answers

Which answer choice shows the number 9.54×10−3 in standard form?

almond37 [142]

Answer:

95.4

.................

7 0

3 years ago

Thirty percent of the CFA candidates have a degree in economics. A random sample of three CFA candidates is selected. What is th

Komok [63]

This is an example of a random variable that follows Bernoulli distribution.

Whenever you perform $n$ experiments, with probability $p$ of success, the provability of havin $k$ successes is

$P(X=k)=\displaystyle\binom{n}{k}p^k(1-p)^{n-k}$

In this case, you have $n=3$ (you choose a sample of 3 candidates), $p=0.3$ (30% of candidates have a degree in economics) and we want $k$ to be at least one.

One way to solve this is to consider that

$P(X\geq 1)=P(X=1)+P(X=2)+P(X=3)$

But it is much quicker to observe that

$P(X\geq 1)=1-P(X$

And we have

$P(X=0)=\displaystyle\binom{3}{0}0.3^0\cdot 0.7^{3}=1\cdot 1\cdot 0.7^3$

So, the probability that at least one of them has a degree in economics is

$1-0.7^3 = 0.657$

4 0

3 years ago

The value, y, in dollars of an autographed basketball after x years can be represented by the function y=4000(1.05)x.

Contact [7]

Answer:

I took the test!!

Step-by-step explanation:

Pit this in your calculator exactly like this 4,000(1.05)^5 and you get the answer 5,105.12625. So round your answer to the nearest dollar, which is 5,105.

8 0

3 years ago