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3 years ago

Solve by using the quadratic form 5r^2-8r+20=0

Mathematics

1 answer:

nevsk [136]3 years ago

3 0

Answer:

Step-by-step explanation:

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What is the area of the shaded part of the triangle ?

Sophie [7]

I got D for this one................

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4 years ago

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Daisy is going 12 mph and Sally is going 8 mph if they where 60 miles apart how many hours would it take for them to meet up

abruzzese [7]

Answer:

3 hours

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

s ----> the speed in mph

d -----> the distance in miles

t ----> the time in hours

x ----> distance traveled by Daisy to the meeting point

60-x ----> distance traveled by Sally to the meeting point

$s=\frac{d}{t}$

Solve for d

$d=st$

<em>Distance traveled by Daisy to the meeting point</em>

$d=st$

we have

$d=x\ mi\\s=12\ mph$

substitute

$x=12t$ ----> equation A

<em>Distance traveled by Sally to the meeting point</em>

$d=st$

we have

$d=(60-x)\ mi\\s=8\ mph$

substitute

$60-x=8t$ ----> equation B

substitute equation A in equation B

$60-12t=8t$

solve for t

$12t+8t=60\\20t=60\\t=3\ hours$

7 0

3 years ago

The area of a square is 72. what is the longest straight line that can be drawn between any two points of the square

goblinko [34]

The longest straight line that can be drawn between any two points of a square is the one that includes the points on the opposite corners of the squares. To determine the length of this straight line, we must first determine the length of the square's side. Since the area of the square can be calculated by taking the square of the side, then

s^2 = 72
s = 6 sqrt(2)

Then, using the Pythagorean theorem, we will find c (the longest side of straight line of the square)

c^2 = a^2 + b^2

Upon substitution of the length of the square's side, we have
c^2 = (6 sqrt(2))^2 + (6 sqrt(2))^2
c^2 = 72+72
c = 72

The length of the longest line is 72.

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3 years ago

What is the area of the parallelogram?

tamaranim1 [39]

Answer:

to find the area of a parallelogram you do base X height

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3 years ago

If jen has 2 meters of taffy and 3 friends but she wants to split her taffy equally amongst her friends how many pieces of taffy

Reptile [31]

Well 2 ÷ 3 = 0.66666667
Each friend would get 0.7 taffy

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4 years ago