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3 years ago

Does doubling the radius of a sphere double the surface area? Explain your reasoning using an example.

Mathematics

1 answer:

Annette [7]3 years ago

5 0

Answer:

yes

Step-by-step explanation:

because area of sphere equals =

$4\pi \: r{2}$

so if we doubled the radius the surface area will be doubled

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Algebra expression 5 minus the difference of m and 2?

Reil [10]

Answer:

7-m

Step-by-step explanation:

The difference of m and 2

m-2

5 minus the difference of m-2

5-(m-2)

5-m+2

Collect like terms

7-m

5 0

3 years ago

lora16 [44]

Answer:

B. 9

Step-by-step explanation:

We assume that ...

SU = ST +TU

133 = (9x-5) +(5x+12)

126 = 14x . . . . . subtract 7, collect terms

9 = x . . . . . . . . . divide by 14

7 0

3 years ago

Write the slope-intercept form of the equation of the line through thr given point with the given slope.

dimaraw [331]

$\bf (\stackrel{x_1}{-4}~,~\stackrel{y_1}{0})\qquad \qquad \qquad slope = m\implies -\cfrac{1}{3} \\\\\\ \stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-0=-\cfrac{1}{3}[x-(-4)] \\\\\\ y=-\cfrac{1}{3}(x+4)\implies y=-\cfrac{1}{3}x-\cfrac{4}{3}$

8 0

3 years ago

Opening Exercise

Jobisdone [24]

Answer:

100% of 180 = 180

25% of 180 = 45

-75% of 180 = -135

37.5% of 180 = 67.5

Step-by-step explanation:

I looked them up on an app so I hope its right!

4 0

2 years ago

The value of a machine when new is £8000. The value depreciates by 10% each year. Work out its value after 3 years

Sladkaya [172]

5,600

8000*.10(y)
8000*.10(3)
8000*.3
5600

8 0

3 years ago