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3 years ago

Plz help!! 20 points!! on the line plz give me a real answer

Mathematics

1 answer:

erastova [34]3 years ago

3 0

Answer:

62.5 feet

Step-by-step explanation:

first you find the area of the triangles by using the formula b*h /2 to get 9 3/8. then since they are all the same size you can multiply it by 4 to get 37.5. then you find the area of the square which is 25. finally add the totals together to get 62.5

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What can you use deductive rules to

uranmaximum [27]

Answer:

In geometry, you can use deductive rules to prove that a given statement or conjecture is true or false using deductive reasoning.

Step-by-step explanation:

6 0

3 years ago

The Capulet and Montague families love writing. Last year, each Capulet wrote 4 essays, each Montague wrote 6 essays, and both f

Eduardwww [97]

Answer:

Infinite solution

Step-by-step explanation:

Let, number of Capulet family = x and number of Montague family = y.

Since, last year, each Capulet wrote 4 essays and each Montague wrote 6 essays.

Moreover, total essays wrote last year are 100.

So, we get, 4x + 6y = 100.

Again, this year, each Capulet wrote 8 essays and each Montague wrote 12 essays.

Moreover, total essays wrote this year are 200.

So, we get, 8x + 12y = 200.

Thus, the system of equations is given by,

4x + 6y = 100.

8x + 12y = 200.

Dividing first equation by 2 and second equation by 4, we get the equation,

2x + 3y = 50.

Since, there is only one equation and two variables i.e. x and y.

There can be infinite number of possibilities for the values of x and y.

6 0

3 years ago

Read 2 more answers

Find the roots of the equation below 7x^2+3=8x

elixir [45]

Hello from MrBillDoesMath!

Answer: (1/7) * ( 4 +\- sqrt(5) i)

where i = sqrt(-1)

Discussion:

The solutions of the quadratic equation ax^2 + bx + c = 0 are given by

x = ( -b +\- sqrt(b^2 - 4ac) )/2a.

The equation 7 x^2 + 3 = 8x can be rewritten as

7x^2 - 8x + 3 = 0.

Using a = 7, b = -8 and c = 3 in the quadratic formula gives:

x = (8 +\- sqrt ( (-8)^2 - 4*7*3) ) / (2*7)

= ( 8 +\- sqrt( 64 - 84)) /(2*7)

= ( 8 +\- sqrt( -20) ) / (2*7)

= ( 8 +\- sqrt( -20) ) / 14

= 8/14 +\- sqrt(5 *4 * -1) /14

= 4/7 +\- 2 sqrt(5) *i /14

As 2/14 = 1/7 in the second term

= 4/7 +\- sqrt(5) *i /7

Factor 1/7 from each term.

= (1/7) * ( 4 +\- sqrt(5) i)

Thank you,

MrB

8 0

3 years ago

A chemical company makes two brands of antifreeze. The first brand is 30% pure antifreeze, and the second brand is 75% pure anti

gtnhenbr [62]

Answer:

Let x = amount of 45% antifreeze

Let y = amount of 70% antifreeze

EQUATION 1: x + y = 150 (total of 150 gallons mixed)

EQUATION 2: .45x + .75y = .55(x + y)

Simplify and solve the system of equations

Multiply second equation by 100 on both sides to remove the decimals

45x + 75y = 55(x + y)

Combine like terms

45x + 75y = 55x + 55y

45x - 55x + 75y - 55y = 0

-10x + 20y = 0

Now we have the following system of equations:

x + y = 150

-10x + 20y = 0

Multiply the first equation by -10 to get opposite coefficients for x; add the equations to eliminate x

10x + 10y = 1500

-10x + 20y = 0

------------------------------

30y = 1500

Solve for y

30y = 1500

y = 50

Since the total mixed gallons is 150, x = 150 - 50 = 100

So we need 100 gallons of the 45% antifreeze and 50 gallons of the 70% antifreeze

3 0

1 year ago

Which of these points lies on the line described by the equation below y-4=-2(x-6)?

Burka [1]

Answer: x=4

Step-by-step explanation:

3 0

3 years ago