All categories

3 years ago

Evaluate for x= 7. (x + 1)(x + 2) x + 1 A) 5 B) 7 C) 8 D) 9

Mathematics

2 answers:

madam [21]3 years ago

6 0

Answer:

A) 5

Step-by-step explanation:

(7 + 1)( 7+ 2) 7 + 1

Lilit [14]3 years ago

4 0

The CORRECT answer is D 9

(the other guy was wrong, I took the test and I got it wrong but luckliy I can save you)

(look at the picture for good luck!)

You might be interested in

A cylinder and its dimensions are shown. Which equation can be used to find V, the volume of the cylinder in cubic centimeters?

irina [24]

Answer:

The volume of a cylinder is given by the equation:

V = π(R)^^2*h

where π = 3.14, R is the radius and h is the height.

If in the image we see that the radius is 7, then the correct option is D.

If in the image we shee that the DIAMETER is 7 (a linea that goes from end to end of the circle and goes trough the middle) then we know that the radus is half of the diameter, 7/2 = 3.5

in this case he correct option is C.

6 0

3 years ago

2 = (8 p +10)<br> how do you solve this problem?

Marta_Voda [28]

Answer:

P=-1

Step-by-step explanation:

8 0

3 years ago

Recent homebuyers from a local developer allege that 30% of the houses this developer constructs have some major defect that wil

umka21 [38]

Answer:

3.54% probability of observing at most two defective homes out of a random sample of 20

Step-by-step explanation:

For each house that this developer constructs, there are only two possible outcomes. Either there are some major defect that will require substantial repairs, or there is not. The probability of a house having some major defect that will require substantial repairs is independent of other houses. So we use the binomial probability distribution to solve this question.

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 combinations 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.

30% of the houses this developer constructs have some major defect that will require substantial repairs.

This means that $p = 0.3$

If the allegation is correct, what is the probability of observing at most two defective homes out of a random sample of 20

This is $P(X \leq 2)$ when n = 20. So

$P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)$

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

$P(X = 0) = C_{20,0}.(0.3)^{0}.(0.7)^{20} = 0.0008$

$P(X = 1) = C_{20,1}.(0.3)^{1}.(0.7)^{19} = 0.0068$

$P(X = 2) = C_{20,2}.(0.3)^{2}.(0.7)^{18} = 0.0278$

$P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0008 + 0.0068 + 0.0278 = 0.0354$

3.54% probability of observing at most two defective homes out of a random sample of 20

5 0

3 years ago

If the sales tax in Alabama is 4 percent and a $20.00 purchase is made. What is the sales price? What is the total purchase pric

mihalych1998 [28]

Hello there! So first off, let's find the tax. In order to find the tax of an item, all you have to do is multiply the price by the percentage, because the tax is the portion of the price. The tax is 4%. Let's solve. 20 * 4% (0.04) is 0.8. The tax is $0.80. Let's add that to the purchase price. 20 + 0.80 is 20.80. That's the total purchase price. Here are the answers easier to read.

Sales tax: $0.80
Total price: $20.80

8 0

3 years ago

Two people are planning their wedding. For the reception, they found the the cost C for 65 guests, g is $2730 whereas the cost f

a_sh-v [17]

The slope that represents the cost per guest is $42 per guest

<h3>How to determine the slope?</h3>

From the question, we have the following parameters that can be used in our computation:

Cost for 65 guests, g is $2730

Cost for 80 guests is $3360

This can be represented as

(g, C) = (65, 2730) and (80, 3360)

The slope is then calculated as

Slope = (y₂ - y₁)/(x₂ - x₁)

Where

(x, y) = (65, 2730) and (80, 3360)

Substitute the known values in the above equation

So, we have the following equation

Slope = (3360 - 2730)/(80 - 65)

Evaluate the quotient

Slope = 42

Hence, the slope is 42