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BigorU [14]
2 years ago
10

Will mark brainliest, worth 60 points

Mathematics
2 answers:
mrs_skeptik [129]2 years ago
6 0
21 is c
22 is b
23 is a
Ostrovityanka [42]2 years ago
3 0

Answer:

21 is option 3

22 is option 3

23 is option 1

Step-by-step explanation:

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Beth wants to plant a garden at the back of her house. She has 32m of fencing. The area that can be enclosed is modelled by the
Maksim231197 [3]

Answer:

The maximum area that can be obtained by the garden is 128 meters squared.

Step-by-step explanation:

A represents area and we want to know the maximum.

A(x)=-2x^2+32x is a parabola.  To find the maximum of a parabola, you need to find it's vertex.  The y-coordinate of the vertex will give us the maximum area.

To do this we will need to first find the x-coordinate of our vertex.

x=\frac{-b}{2a}{/tex] will give us the x-coordinate of the vertex.Compare [tex]-2x^2+32x to ax^2+bx+c then a=-2,b=32,c=0[tex].So the x-coordinate is [tex]\frac{-(32)}{2(-2)}=\frac{-32}{-4}=8.

To find the y that corresponds use the equation that relates y and x.

y=-2x^2+32x

y=-2(8)^2+32(8)

y=-2(64)+32(8)

y=-128+256

y=128

The maximum area that can be obtained by the garden is 128 meters squared.

8 0
3 years ago
Need Help ASAP!!
Aleksandr-060686 [28]

Answer:

$1480.24

Step-by-step explanation:

This will be solved by the formula:

FV=I(1+r)^t

Where

FV is the future value (what we are looking for)

I is the initial amount (which is $1000)

r is the rate of interest per period (8% is annual interest, but the period is SEMI-ANNUAL, that's 6 months, half of yearly. So r would be half of 8%, which is 4% or r = 0.04)

t is the times compounding occurs in the whole time (The whole time period is 5 years, but compounding occurs semi-annually, so 5*2 = 10 times. Thus, t = 10)

<em>plugging the info into the formula we will get our answer.</em>

<em>FV=I(1+r)^t\\FV=1000(1+0.04)^{10}\\FV=1000(1.04)^{10}\\FV=1480.24</em>

4 0
3 years ago
If you walk to school at a rate of 3 miles per hour, how long will it take you to walk 6 miles?
Rudik [331]

Answer:

2 hours

Step-by-step explanation:

3*2=6

bc 3mph times 2 its 6 miles

7 0
2 years ago
Read 2 more answers
Rewrite 3.47 • 10^5 in standard form
sesenic [268]
The answer is 347000
5 0
3 years ago
Jeremiah opened a savings account with a one time deposit of $500. His savings account will pay a 5% simple interest per year. H
Feliz [49]
I think it’s C hopefully
8 0
2 years ago
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