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4 years ago

I need help answering this so please help

Mathematics

2 answers:

Vaselesa [24]4 years ago

6 0

Answer:

(2, f(2))

Step-by-step explanation:

f(x) = -3x^2

For point B, the y-coordinate is f(2).

Point B is (2, f(2))

algol [13]4 years ago

6 0

F(x) = -3x^2 is same as
y= -3x^2

To evaluate f(x) = -3x^2 substitue x = 2 which gives you the y coordinate which would be f(2)

Therefore the ordered pair which gives location of point B is

(2, f(2))

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2b) A farmer is building a pen inside a barn. The pen will be in the shape of a right triangle.

kenny6666 [7]

Answer:

Step-by-step explanation:

the sum of any two sides of a right triangle more than any other side

14+15>29, x is less than 29

14+x>15

x>1

15+x>14

x>-1

1<x<29

lets use Pythagorean Theorem

14^(2)+15^(2)=c^2

196+225=c^2

421=c^2

plusminus sqrt(421)=c

distance can't be negative, so:

c=sqrt(421)

c=20.5182845287

sqrt(421) is the largest possible right triangle side

1<x $\leq$ sqrt(421)

B) as we can see from above, the largest possible length of the third side is 14/sqrt(421) or about 20.5182845287ft

C)sqrt(421) by 14 by 15

tan(x1)=15/14

x1=tan^-1(15/14)

x1=47 degrees

tan(x2)=14/15

x2=tan^-1(14/15)

x2=43 degrees

7 0

3 years ago

Determine if the situation described in each row can be represented by 9x+3=21 or by 3x+9=21. Select the correct answer in each

grin007 [14]

Selina gave 2 stickers to each of her friends.

Robert bought 4 bottles of paint.

<h3>What is a numerical expression?</h3>

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, Selina had 21 stickers. She gave the same amount of stickers to each of her 9 friends and had 3 stickers left over.

This can be represented as,

9x + 3 = 21.

9x = 18.

x = 2.

So, she gave 2 stickers to each of her friends.

Robert went to an art supply store.

He got a pack of paintbrushes for $9 and some bottles of paint for $3 each.

His total came out to $21, before tax.

3x + 9 = 21.

3x = 12.

x = 4.

Robert bought 4 bottles of paint.

learn more about numerical expression here :

brainly.com/question/29199574

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4 0

1 year ago

Given f(x) and g(x) = f(x) + k, use the graph to determine the value of k.<br> g(x)<br> f(x)

vlada-n [284]

Answer:

k = 4

Step-by-step explanation:

First, find the equations of each function.

f(x) = x/3 - 3

g(x) = x/3 + 1

Then plug these values for g(x) = f(x) + k.

x/3 + 1 = x/3 - 3 + k subtract x/3 on both sides

1 = -3 + k add -3 on both sides

k = 4 we're done!

and this makes sense because g(x) is just a translation of f(x) 4 units up.

5 0

2 years ago

Decide whether the pair of lines is parallel, perpendicular, or neither. 3x-6y=2 and 18x+9y=8

Ray Of Light [21]

Answer: perpendicular

Step-by-step explanation:

8 0

3 years ago

What is -8x + 2 = -7x + 10

RSB [31]

-8x+2=-7x+10
-x+2=10
-x=8
x=-8

7 0

4 years ago

Read 2 more answers