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4 years ago

Help on math please answer both

Mathematics

1 answer:

ELEN [110]4 years ago

5 0

To get from red to blue in the first one, we multiply it by the blue side length (6) over the red side length (11) since they are similar, getting 6/11. Since the area is base*height for a parallelogram , we can assume that the height of the blue parallelogram is 6/11th of the red one. Therefore, 6/11(height)*(6/11)(base)=(6/11)^2=36/121. The Area of Similar Polygons Theorem states that to get from the ratio to the sides to the ratio to the area, you simply square the ratio of the sides. For red to blue for the pentagons, we do blue/red=7/4. Square that for the areas, which is (7/4)^2=49/16

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I need answer how to do number 3

Olegator [25]

You know that you need two already to make one hexagon. So, if you multiply, or add two four times, 2+2+2+2, you would get eight.

3 0

3 years ago

Read 2 more answers

in a proportional relationship the ratio y/x is constant. Show that this ratio is not constant for the equation y=a-14

Colt1911 [192]

To show that the ratio $\frac{y}{x}$ is not constant for the function $y=a-14$ we only need to evaluate this function at 2 points and then show that the ratio is not the same for those two points. Note that here $a$ represents $x$ .

To find the counter examples here, I will use the values $a=20$ and $a=28$ . For $a = 20$ , the equation tells us that the output is

$y=20-14=6$ . For this value of $a$ the point is point is $(20,6)$ . The ratio $\frac{y}{x} =\frac{6}{20}$ . For the $a=28$ , $y=28-14=14$ . For this value of $a$ the point is $(28,14)$ . The ratio $\frac{y}{x} =\frac{14}{28} =\frac{1}{2}$ . Clearly this ratio is not constant for all ordered pairs.

8 0

3 years ago

A towel has a repeating pattern of two green stripes, then 3 blue stripes, and then 1 yellow stripe. If the towel has 20 stripes

EleoNora [17]

The answer would be a total of 9 blue stripes.

4 0

3 years ago

Hey can some one help me, Define a variable and write each phrase as an algebraic expression:

Elena L [17]

Answer:

1. d - 6 ft

where d is the width

2. t + 6 h/week

where t is the amount of time per week Theodore studies

3. t’ - 6 a

where t’ is Tracy’s age

4. (k/3) - 2

where k is the points that the panthers scored

Step-by-step explanation:

Write the variable and do the operations as described!

“less than” means subtraction, “more […] than” means addition and “one-third of” means division by 3.

8 0

3 years ago

While mining Fred found a large metal bar that contained 24 ounces of nickel. Fred also determined that the bar was 80% nickel.

frutty [35]

Answer:

Not that I'm a chemistry expert but mathematically,The total weight of the bar is directly proportional to the known weight of the bar and the given percentage. I worked it out and found that the the total weight of the bar is 30 ounces. This is how I did it

Step-by-step explanation:

80:24

100:n

80(n)=100×24

A little equation and after it's solve the variable (n) will be equal to 30

The unit is added after calculations so that's how the answer is 30 ounces

8 0

3 years ago