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vivado [14]
3 years ago
8

What expression is equivalent to 9x^2-16?

Mathematics
1 answer:
erica [24]3 years ago
3 0

Answer:

(3x + 4) • (3x - 4) hope we can be friends can i please get brainliest

Step-by-step explanation:

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 32x2 -  16

Step  2  :

Trying to factor as a Difference of Squares :

2.1      Factoring:  9x2-16  

Theory : A difference of two perfect squares,  A2 - B2  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =

        A2 - AB + BA - B2 =

        A2 - AB + AB - B2 =

        A2 - B2

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check :  9  is the square of  3  

Check : 16 is the square of 4

Check :  x2  is the square of  x1  

Factorization is :       (3x + 4)  •  (3x - 4)

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The volume of a pyramid is 37cm3. Its base area is 6cm2. What is its height? Round your answer to the nearest tenth of a unit.
STALIN [3.7K]

Answer 3.1

Here's the formula:

V=\frac{lwh}{3}

H=3\frac{V}{lw}

3 ·  \frac{37}{6x6} ≈ 3.08333

rounded to : 3.1

(P.S. I also Used a calculator)

7 0
3 years ago
The average speed of a car during 5 hours is 50 miles per hour. What is the total distance traveled by the car?
Paraphin [41]

Answer:

250 miles

Step-by-step explanation:

So we know that the time (t) equals 5 hours and that the rate (r) equals 50 mph. So knowing that, we can use the formula t*r=distance. We plug in the numbers and we get 250 miles.

Another way to think about this is, since we go 5 hours and 50 miles per hour, every hour we go 50 miles and we do that for 5 hours, so we go 50, 100, 150, 200, 250.  

6 0
3 years ago
How do you solve this
UNO [17]
7 divided by 1 is 7 so you would do long division
5 0
3 years ago
Use the Rational Zeros Theorem to write a list of all potential rational zeros f(x) = 14x^3 + 56x^2 + 2x - 7
Crank
The factors of 7are -1 and 7 or 1 and -7, the factors of 14 are 1, 2, 7, and 14, or -1,  -2, -7,-14. so the list of potential zeros are: 1/1, 1/2, 1/7, 1/14, 7/1,7/2, 7/7, 7/14, which can be simplified into 1, 1/2,1/7, 1/14, 7, 7/2
add the negative ones: -1, -1/2,-1/7, -1/14, -7, -7/2
I believe there are a total of 12 potential zeros
reference: 
http://www.sparknotes.com/math/algebra2/polynomials/section4.rhtml

3 0
3 years ago
A math teacher is trying to analyze her test grades. She surveys the students to find out how many minutes they studied. She the
Natali [406]
<span>Well, they couldnt have studied negative time.. So Id say the domain is \(x \ge 0\) where \(x\) is the time they studied.</span>
5 0
3 years ago
Read 2 more answers
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