All categories

2 years ago

(x+7)(x+9) Do this math problem by using the Foil method.

Mathematics

2 answers:

Mila [183]2 years ago

8 0

Answer:

Step-by-step explanation:

F: x * x = x^2

O:9 * x = 9x

I : 7 * x = 7x

L: 7 * 9 = 63

x^2 + 9x + 7x + 63

x^2 + 16x + 63

Setler79 [48]2 years ago

3 0

Foil:
First term
Outer term
Inner term
Last term

By using foil we just times the first terms together so: x*x=x^2

Then we times the outer terms together so: x*9=9x

Then we times the inner terms together so:7*x=7x

Finally we times the last terms together so: 7*9=63

So our equation is:
X^2+9x+7x+63

Now we collect the like terms

Answer: x^2+16x+63

Hope this helped

You might be interested in

How many rational numbers are between -2 and 5?

Butoxors [25]

The answer is 7 because 2 to 5 is 3 and -2 to 5 I 7

4 0

2 years ago

Let V be the volume of the solid obtained by rotating about the y-axis the region bounded y = 4x and y = x2/4 . Find V by slicin

aliya0001 [1]

Answer:

Step-by-step explanation:

Consider the graphs of the $y = 4x$ and $y = \frac{x^{2} }{4}$ .

By equating the expressions, the intersection points of the graphs can be found and in this way delimit the area that will rotate around the Y axis.

$4x = \frac{x^{2} }{4} \\ x^{2} = 16x \\ x^{2} - 16x = 0 \\ x(x-16) = 0$ then $x=0$ o $x=16$ . Therefore the integration limits are:

$y = 4(0) = 0$ and $y = 4(16) = 64$

The inverse functions are given by:

$x = 2 \sqrt{y}$ and $x = \frac{y}{4}$ . Then

The volume of the solid of revolution is given by:

$\int\limits^{64}_ {0} \, [2\sqrt{y} - \frac{y}{4}]^{2} dy = \int\limits^{64}_ {0} \, [4y - y^{3/2} + \frac{y^{2}}{16} ]\ dy = [2y^{2} - \frac{2}{5}y^{5/2} + \frac{y^{3}}{48} ]\limits^{64}_ {0} = 546.133 u^{2}$

6 0

3 years ago

Stereo has a list price of $150 but is on sale for 20% off the list price what is the sale price of the stereo???

8_murik_8 [283]

Answer:

The correct answer is option A.120

Step-by-step explanation:

Let's start by analyzing the information they have given us.

We know that the stereo has a list price of $ 150, but at the time of payment, we are told that it has a 20% discount.

Now we must find out what the discount was applied to know the final price of the stereo.

One way to calculate the percentage would be multiplying 150 by 0.20

150.0.20 = 30

The discount applied is $ 30, so now we just have to subtract that amount from the original price:

150-30 = 120

Therefore, the correct answer is option A.

3 0

3 years ago

Read 2 more answers

Is shipping box is a shape of a cube. Each side measures 3c^6d^2 inches. Express the volume of a cube has a monomial.

liubo4ka [24]

Length of each side of cube is = $3c^6d^2$

SO the volume of cube = $(Side)^3$
= $(3c^6d^2)^3$
= $27 * (c^6)^3(d^2)^3$
= $27c^{18}d^6$

SO the volume of cube is $27c^{18}d^6$

9 0

3 years ago

Read 2 more answers

How many microseconds are in one second?

Greeley [361]

The answer is 1,000,000

7 0

3 years ago

(x+7)(x+9) Do this math problem by using the Foil method.​

(x+7)(x+9) Do this math problem by using the Foil method.