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Vikki [24]
3 years ago
6

What are the solutions of the equation 9x4 – 2x2 – 7 = 0? Use u substitution to solve.

Mathematics
2 answers:
oksano4ka [1.4K]3 years ago
8 0

Answer:

Step-by-step explanation:

Debora [2.8K]3 years ago
6 0

Answer:

the answer is 25

Step-by-step explanation:

and you get it by multiplying 9×4 keep the answer on paper then do 2×2 which is 4 subtract the two answers and subtract 7 and then you get 25, your welcome

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A rectangular field is to be enclosed by a fence and divided
Phantasy [73]

Answer:

80000 square meters

Step-by-step explanation:

perimeter + dividing fence = 800

let a = length

let b = width

let c = length of dividing fence

perimeter = 2*a + 2*b

let's say...

c is the same as the length

2a + 2b + c = 800

2a + 2b + a = 800

3a + 2b = 800

area = length*width

area = a*b

area / b = a

3*(area/b) + 2b = 800

3*(area/b) = 800 - 2b

area/b = (800 - 2b)

area = (800 - 2b)*b

To make the area large, we make the right hand side large.

800b - 2b^2

If you put in terms of x, y it looks like a downward opening parabola, so the max area is at the vertex. Half way between the roots.

y = -2x^2 + 800x

y = -x^2 + 400x

0 = x*(-x + 400)

roots are x= 0 and x = 400

vertex is at x, aka b = 200

area at b=200 is (800 - 400)*200 = 80000

and a is area/b... 80000/400 = 200

5 0
3 years ago
The Backyard Bagel Shop has a total of 720 bagels in 48 different bins. If each bin has the same number of bagels, how many bage
aliya0001 [1]
I believe it would be 15:)
5 0
3 years ago
Read 2 more answers
The area of a square can be found using the equation A = s², where A is the area and s is the measure of one side of the square.
Galina-37 [17]
Hi there!

Let's use the given formula of a square (A = s^2), to figure out what the equation would be. We are looking for one side, or s here. 

WORK:
81 = s^2
squareroot(81) = s

ANSWER:
The second option, root 81.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
3 0
3 years ago
Segment DC is a diameter of circle A in the figure below. If angle DAB measures 34 degrees, what is the measure of arc BC?
Greeley [361]
180 - 34 = 146 degrees
6 0
3 years ago
Read 2 more answers
(10-x)(3x -9)=0<br><br> NEED HELP ASAP
crimeas [40]

Answer:

Step-by-step explanation:

Since the expressions are multiplied, for the product to equal zero, one term or another has to equal 0 because 0 times anything is zero.

(10-x)(3x-9)=0 when

10-x=0, x=10

3x-9=0, x=9/3=3

So there are two solutions when x=3 and x=10

7 0
3 years ago
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