All categories

4 years ago

When evaluating proportions, we write the ratios in fractional form and then we

1 answer:

7 0

Answer: set the cross product equal.

Explanation.

A proportion is the equality of two ratios.

For example:

1        6
--- = ------
3       18

You may use the proportions to find the value of an unknown quanity

For example

1        x
--- = ----
3       24

So, if you want to solve for the unknown, the next step isto set the cross product equal:

1*24 = 3*x

=> 24 = 3x

From which you can obtain: x = 24 / 3 = 8

You might be interested in

Evaluate the expression for the given value. 3x(x−2), when x=7 .

UkoKoshka [18]

Answer:

$\huge\boxed{Answer\hookleftarrow}$

Given,

$x = 7$

Substitute the value of 'x' in the equation 3x (x - 2).

One way :-

$3x(x - 2) \\ = 3 \times 7(7 - 2) \\ = 21(5) \\ = 21 \times 5 \\ = 105$

Second way :-

$3x(x - 2) \\ = 3x {}^{2} - 6x \\ = 3 \times (7) {}^{2} - 6(7) \\ = (3 \times 49) - (6 \times 7) \\ = 147 - 42 \\ = 105$

✐ The answer is 105.

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

# ꧁❣ RainbowSalt2²2² ࿐

8 0

3 years ago

Pls help this one I just don't get Thank you

serious [3.7K]

I know!

So since Volume = lwh

So you multiply all those mixed numbers, and whole numbers.

So it would look like this,

Length * width * height

Also, * = multiplication

So, in short.
Multiply all those numbers.

5 1/2 , 3 , 1 1/2

4 0

3 years ago

Read 2 more answers

Customers arrive at a grocery store at an average of 2.1 per minute. Assume that the number of arrivals in a minute follows the

Black_prince [1.1K]

Answer:

a) P(2)=0.270

b) P(X>3)=0.605

c) P=0.410

Step-by-step explanation:

We know that customers arrive at a grocery store at an average of 2.1 per minute. We use the Poisson distribution:

$\boxed{P(k)=\frac{\lambda^k \cdot e^{-\lambda}}{k!}}$

a) In this case: $\lambda=2.1$

$P(2)=\frac{2.1^2 \cdot e^{-2.1}}{2}\\\\P(2)=0.270$

Therefore, the probability is P(2)=0.270.

b) In this case: $\lambda=2\cdot 2.1=4.2$

$P(X>3)=1-P(X\leq 3)\\\\P(X>3)=1-\sum_{x=0}^3 \frac{4.2^x \cdot e^{-4.2}}{x!}\\\\P(X>3)=1-0.395\\\\P(X>3)=0.605$

Therefore, the probability is P(X>3)=0.605.

c) We know that two customers came in in the first minute. That is why we calculate the probability of at least 5 customers entering the other 2 minutes.

In this case: $\lambda=2\cdot 2.1=4.2$

$P(X\geq 5)=1-P(X$

Therefore, the probability is P=0.410.

4 0

3 years ago

Marcus bought a booklet of tickets to use at the amusement park. He used 50% of the tickets on rides, 1/10 of the tickets on vid

Elenna [48]

Answer:

If he used 50% on ticket for rides, the remaining tickets he would have is (100% - 50%) 50%.

He used 1/10 on video games. Converting 1/10 to percentage gives 10%.

The total percentage of tickets used is 60%. He should have 40% to spend on batting cages

Step-by-step explanation:

4 0

3 years ago

svetlana [45]

retirement savings hope that helps ;)

7 0

3 years ago

Read 2 more answers