Find the perimeter of the triangle 40 9

Answers

Answer 1

Answer: To solve for the perimeter of the triangle, first use Pythagorean theorem to solve for the hypotenuse and then add all of the sides together.

40 ^2 + 9^2
1600 + 81
1681 = C^2
41 = C

P = a + b + c
P = 40 + 9 + 41
P = 81 + 9
P = 90 units.

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A science class measured the mass of a balloon to be 4 grams.After the balloon was inflated the mass was 8 grams.What was the mass of the air inside the inflated balloon?

I have no idea how to do this stuff.

Answers

Answer: $y=2x^(2)-5x+7$

Step-by-step explanation:

The quadratic equation in its standard form is:

$y=ax^(2)+bx+c$

Now, we are given 5 points of the parabola (if you graph a quadratic equation you will have a parabola), however we only need to choose three points to find the coeficients $a$ , $b$ and $c$ in the quadratic equation.

So, let's choose the first three points:

(-1,14):

$14=a(-1)^(2)+b(-1)+c$

$14=a-b+c$ (1)

(0,7):

$7=a(0)^(2)+b(0)+c$

$7=c$ (2)

(1,4):

$y=2x^(2)-5x+7$

$4=a(1)^(2)+b(1)+c$

$4=a+b+c$ (3)

Substituting (2) in (1) and (3):

$14=a-b+7$ (4)

$4=a+b+7$ (5)

At this point we have a system with two equations.

Adding (4) to (5):

$18=2a+14$ (6)

Isolating $a$ :

$a=2$ (7)

Substituitng (7) in (3):

$4=2+b+7$ (8)

Isolating $b$ :

$b=-5$ (9)

Now we have the three coeficients and we can write the quadratic equation:

$y=2x^(2)-5x+7$

Please answer correctly !!!! Will mark brainliest !!!!!!

Answers

My answer that I got is 1 4/5

cammie goes to the gym to exercise 4 times per week altogether how many times does she go to the gym. in ten weeks ?

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40 is the answer

hope this helps :)

4 times 10 weeks equals 40 weeks altogether

During the first hour of operation the farm stand owner sold 15% of the apples he had. On the second hour he sold 20% of the remaining apples. On the third hour he sold 25% of the remaining apples, and so on, selling 5% more each following hour. If during the third hour he sold 34 kg of apples, how many kilograms of apples did he have initially?

Answers

Answer:

75 kg

Step-by-step explanation:

%25 of ___ will give you 34.

____ x 0.20 = 34

____ = 34/0.20

34/0.20=170

___=170

A sequence is defined recursively by f(0)=2 and f(n)=f(n+1)=-2f(n)+3 for n greater than or equal to 0, then f(2) is equal to

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If you would like to know what is f(2), you can calculate this using the following steps:

f(0) = 2
f(n+1) = - 2 * f(n) + 3
f(1) = - 2 * f(0) + 3 = - 2 * 2 + 3 = - 4 + 3 = - 1
f(2) = - 2 * f(1) + 3 = - 2 * (-1) + 3 = 2 + 3 = 5

The correct result would be f(2) = 5.

What is a equivalent ratio for 40:28=_:7

Answers

40:28 is equivalent to 10:7

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Jenna has 2 whole watermelon and one-third of another watermelon. Write a mixed number and improper fraction to represent the amount of watermelons she has.