All categories

3 years ago

Help me answer this question please (use full working)

Mathematics

1 answer:

guapka [62]3 years ago

4 0

Step-by-step explanation:

The above variation is written as

y = kx²

where k is the constant of variation

when y = 20 and x = 1

we have

20 = k(1)²

k = 20

So the formula for the variation is

y = 20x²

when x is doubled that's x = 2

y = 20(2)²

y = 20(4)

when y = 80

We have

80 = 20x

Divide both sides by 20

Hope this helps you

You might be interested in

What is the answer to 0=- 1/4(16)+b

Setler79 [48]

Answer:

Step-by-step explanation:

$0=-\dfrac{1}{4\!\!\!\!\diagup_1}\cdot16\!\!\!\!\!\diagup^4+b\\\\0=-4+b\qquad\text{add 4 to both sides}\\\\4=-4+4+b\\\\4=b\to b=4$

5 0

2 years ago

No clue how to do this

andreev551 [17]

B is your awnser! sorry if im wrong my calc shows its without a - symbol

7 0

2 years ago

A company is planning to manufacture snowboards. The fixed costs are $ 100$100 per day and total costs are $55005500 per day at

Rama09 [41]

Answer:

The equation for total cost function is

C(x)=100+270x

Step-by-step explanation:

Variable cost per per board =total cost per day-fixed cost per day/daily output

total cost per day is $5,500

fixed cost per day is $100

20 boards are produced per day

variable cost per board=($5,500-$100)/20=$270 per day

Total cost C(x)=fixed cost per day+ variable per board*number of daily output

Since daily output is represented also by x ,total cost function is given thus:

C(x)=100+270x

4 0

3 years ago

Use the figure to the right to find the missing lengths of the triangle.

pychu [463]

To find AB(x) and BC(y), you can do(there are multiple ways you can do this):

tan A = $\frac{y}{7}$

tan 60° = $\frac{y}{7}$ or (tan 60°) · 7 = y

tan 60° = $\frac{\frac{\sqrt{3} }{2} }{ \frac{1}{2} } = \sqrt{3}$

√3 · 7 = y

7√3 cm = y

sin B = $\frac{7}{x}$

sin 30° = $\frac{7}{x}$ or $x= \frac{7}{sin 30}$

sin 30° = $\frac{\frac{1}{2} }{1}$ = $\frac{1}{2}$

x = $\frac{7}{\frac{1}{2} } = 14$

x = 14 cm

AB = 14cm

BC = 7√3 cm

8 0

3 years ago

I really need help and this not working

Nostrana [21]

Answer:

Help with what

Step-by-step explanation:

6 0

1 year ago

Help me answer this question please (use full working)​

Help me answer this question please (use full working)