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3 years ago

Directions - Solve each equation for the variable. 5) x/3 + 3 = 7

Mathematics

2 answers:

mamaluj [8]3 years ago

6 0

Answer:

X = 12

Step-by-step explanation:

Alecsey [184]3 years ago

3 0

Answer:

x=12

Step-by-step explanation:

(Refer to image)

You want to isolate the x, so you want to get everything away from it that you can till it's alone.

First, you subtract 3 to cancel it out (on both sides)

Then, you multiply 3, since you're dividing it. You want to do the opposite to cancel something out.

If you need clarification or can't read my handwriting, just ask!

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A baseball player has a batting average of 0.25. What is the probability that he has exactly 2 hits in his next 7 at bats

marissa [1.9K]

Answer:

The probability that he has exactly 2 hits in his next 7 at-bats is 0.3115.

Step-by-step explanation:

We are given that a baseball player has a batting average of 0.25 and we have to find the probability that he has exactly 2 hits in his next 7 at-bats.

Let X = Number of hits made by a baseball player

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r}; x = 0,1,2,......$

where, n = number of trials (samples) taken = 7 at-bats

r = number of success = exactly 2 hits

p = probability of success which in our question is batting average

of a baseball player, i.e; p = 0.25

SO, X ~ Binom(n = 7, p = 0.25)

Now, the probability that he has exactly 2 hits in his next 7 at-bats is given by = P(X = 2)

P(X = 2) = $\binom{7}{2}\times 0.25^{2} \times (1-0.25)^{7-2}$

= $21 \times 0.25^{2} \times 0.75^{5}$

= 0.3115

5 0

4 years ago

Hey:) can you please help me posted picture of question

oee [108]

Answer:
x² + 10x + 25

Explanation:
Before we begin, remember the following:
(a + b)(a + b) = (a + b)² = a² + 2ab + b²

Now, for the given we have:
(x + 5)(x + 5)
We can note that the two brackets are identical.
Therefore, we can apply the above rule as follows:
(x + 5)(x + 5) = (x + 5)²
= (x)² + 2(x)(5) + (5)²
= x² + 10x + 25

Hope this helps :)

8 0

3 years ago

Billy has a credit card with a current balance of $3,500 and a 16% APR. With his current monthly payment, he will be able to pay

natka813 [3]

Answer:

$58.57

Step-by-step explanation:

7 0

3 years ago

The question is 8x+tx=r What you wanna solve for is x

ella [17]

Answer:

x = r/(8+t)

Step-by-step explanation:

8x + tx = r

Using distributive property,

x(8+t) = r

Divide by 8+t on both sides,

x = r/(8+t)

3 0

3 years ago

If pound of cheese costs $3.43, what is the cost per pound? PLS HELP

Gekata [30.6K]

Answer:

can you rephrase it? how many pounds are there?

Step-by-step explanation:

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2 years ago