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olga_2 [115]
2 years ago
13

Help anyone can help me do the question 4,I will mark brainlest.​

Mathematics
2 answers:
nasty-shy [4]2 years ago
8 0

Answer:

Hello,

Step-by-step explanation:

A=(1,2)\\B=(0,-1)\\\overrightarrow{AB}=((0,-1)-(1,2)=(-1,-3)\ ||\overrightarrow{AB}||^2=1+9=10\\\overrightarrow{BC}=((3,-2)-(0,-1)=(3,-1)\ ||\overrightarrow{BC}||^2=9+1=10\\\\Triangle\ is\ isosceles.\\\\\overrightarrow{AB}.\overrightarrow{BC}=(-1,-3)*\left[\begin{array}{c}3\\-1\end{array}\right] =-3+3=0\\\\Triangle \ is\ right.\\\\

Darina [25.2K]2 years ago
6 0

Answer:

(Work below)

<em>BRAINLIEST, PLEASE!</em>

Step-by-step explanation:

A(1, 2) B(0, -1) C(3, -2)

The distance between A and B is:

3^2 + 1^2 = c^2

9 + 1 = c^2

c = 10^1/2

The distance between B and C is:

1^2 + 3^2 = c^2

1 + 9 = c^2

c = 10^1/2

The distance between C and A is:

4^2 + 2^2 = c^2

16 + 4 = c^2

c= 20^1/2

Since AB and BC are the same, but AC isn't, the triangle is isosceles.

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Cambridge slim ate 27 sausages in the first 11 minutes of a high stakes eating contest assuming that he conuitnes at the same pa
velikii [3]

Answer: 36 whole sausages by the end of the contest.

Step-by-step explanation:

We know that he ate 27 sausages in 11 minutes, then the rate at which he ates sausages is:

R = (27 sausages)/(11 minutes) = 2.45 sausage/min

So if he ate at this rate for 15 minutes, the total number of sausages eaten by the end is:

Total number = (2.45 sausage/min)*15min = 36.8 sausages

(where we are counting again the 27 sausages that he ate in the first 11 mins)

If we only count the number of whole sausages eaten, he ate 36 whole sausages.

6 0
3 years ago
What are the factors of 9t^2+12t+4
yarga [219]

Answer: (3t-2)^2

Step-by-step explanation:

Well, multiply 9 and 4 together to get 36.

Now what factors of 36 add to 12? Well, 6 and 6, so let's rewrite this:

9t^2-6t-6t+4

Now group factor what you can:

3t(3t-2)-2(3t-2)

Now 3t and -2 both share the common factor of (3t-2) so you can rewrite it as:

(3t-2)(3t-2) which is:

(3t-2)^2.

Hope that makes sense or helps!

4 0
3 years ago
Can anyone solve all of these? Sorry it’s a bad picture.
Vladimir [108]

Answer:

N. -104

S. 112

O. -59

Step-by-step explanation:

i will try my best to solve all of them, but may set up some problems that are ready to be solved.

N. Find (f + g)(8) what this question means is to find the function of <em>f</em> and <em>g </em>added together. the 8 is equal to x, so you will first combine the functions f and g together, and then we will worry about 8

f(x) =3x+4 and g(x) = -2x²-4 (f+g)(x) is the same as the functions f and g added together:

(3x + 4) + (-2x²-4) = -2x² + 3x

now we will set x = 8 and solve

(f+g)(8)= -2(8)² + 3(8) --> -2(64) + 24 = -104 < this is our answer for (f+g)(8)

S. Find (f × g)(-4) this is similar to the above problem, except it is multiplication. we will solve for (f*g) first

f(x) = x + 2 and g(x) = x³-2x

(f×g)(x) = (x+2)(x³-2x) <-- use FOIL to solve and we get:

x^4 + 2x³ - 2x² - 4x and now we subtitute -4 for x

(f×g)(-4) = (-4)^4 + 2(-4)³ - 2(-4)² - 4(-4) = 112 < this is our answer for (f*g)(-4)

O. Find (f - g)(4) again, similar to the above problems besides the sign

f(x) = 4x-3 and g(x) = x³+2x

(f - g)(x) = (4x - 3) - (x³ + 2x) <-- remember to distribute the negative sign in front of x³ + 2x, or else you will not get the correct answer

this is equal to: -x³+2x-3 and now we put x = 4

-(4)³ + 2(4) -3 = -59 < this is our answer for (f - g)(4)

edit: was able to add the answers

I. Find (f×g)(1)I will set this problem up for you because I have done a similar problem for S

f(x) = x²+4 + 2x and g(x) = -3x+2

(f×g)(x) = -3x³-4x² - 8x + 8<-- x = 1 in this equation, so solve for that and you should have your answer

W. Find (f+g)(10) again, I will set this problem up for you again since there is a similar problem for N

f(x) = 3x+3 and g(x) = -4x+1

(f+g)(x) = 3x+3 + (-4x+1) = -x + 4<-- x = 10 in the equation and you just have to plug in the value 10 for x and that would be the answer

B. says I have swear words in this answer, but the answer is -16, please let me know if you would like an explanation for this question

H. Find(f × g)(-4)i will solve this problem entirely instead of setting it up like the last similar one

f(x) = 2x - 1 and g(x) = 3x - 3

(f×g)(x) = (2x-1)(3x-3) = 6x² - 9x + 3 <-plug in -4 for x

(f×g)(-4) = 6(-4)² -9(-4) + 3 = 135 <this is our answer for (f*g)(-4)

K.Find (f×g)(-1) i will solve this problem as well

f(x) = x²+3 and g(x)=4x-3

(f×g)(x) = (x²+3)(4x-3) = 4x³ - 3x² + 12x - 9

(f×g)(-1) = 4(-1)³ - 3(-1)² + 12(-1) - 9 = -28 <answer for (f×g)(-1)

T. Find f(g(2))the meaning of this is f composed of g, it can also be stylized as (fºg). this means that the x value of the function g is 2, and the solution to the function g is the x value of the function f. so lets solve this:

f(x) = 3x+2 and g(x) = 2x² + 5 we will solve g(2) first

g(2) = 2(2)² + 5 = 2(4) + 5 = 8 + 5 = 13so g(2) = 13

now we plug the solution to g(2) into f(x)

f(13) = 3(13)+2 = 39 + 2 = 41 <this is our answer to f(g(2))

6 0
2 years ago
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2 years ago
Find the volume pls
OlgaM077 [116]

Answer:

i think it is 340

Step-by-step explanation:

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2 years ago
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