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kipiarov [429]
3 years ago
15

Justin is 2 years older than one third Marcella's age. Aimee is four years younger than 2 times Justin's age. Define a variable

and write an expression to represent Justin's age. Then find Justin's age and Aimee's age if Marcella is 63 years old.

Mathematics
1 answer:
Mademuasel [1]3 years ago
7 0
Apologies if it’s dark but here’s the work for your question. If you need an explanation, let me know.

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Which of these shapes are quadrilaterals? Choose ALL the correct answers.
kherson [118]

Answer:

The red square, the green rectangle, the pink rhombus, and the green trapezoid.

Step-by-step explanation:

A quadrilateral is a shape that has 4 sides so all you have to do is count how many sides the shape has.

3 0
3 years ago
A spinning giant star of initial radius R1 and angular speed ω1 suddenly collapses radially inward reaching a new radius R2 = 0.
tiny-mole [99]

Answer:

K1/K2=4

Step-by-step explanation:

The kinetic energy of a rotating sphere is given by:

K=\frac{I*\omega^{2} }{2}

The moment of inertia of a solid sphere is given by

I=\frac{2MR^{2} }{5}

The initial kinetic energy is therefore

K_1=\frac{2MR^{2}*\omega^{2} }{10}

K_1=\frac{MR_1^{2}*\omega^{2} }{5}

The final kinetic energy is given by

K_2=\frac{MR_2^{2}*\omega^{2} }{5}

Therefore the relation K1/K2 if R2 = 0.5R1

\frac{K_1}{K_2} =\frac{5M(R_1)^{2}*\omega^{2} }{5*M(0.5R_1)^{2} \omega^{2}}

The text says nothing about the final angular velocity just the collapse of the collapse of the radius

\frac{K_1}{K_2} =\frac{1 }{(0.5)^{2} }=4

3 0
3 years ago
I need to know how to do these!!
Aloiza [94]
The four would go under neith in the left hand side but I don’t know how to explain it
6 0
3 years ago
Read 2 more answers
Sam wants to leave an 18% tip for his dinner. The bill is for $23.50.
vlabodo [156]
Divide the % of tax u want to leave by 100 then multiply that by the total. that will give u the $ of tax. if u add that on to the sub total that will give u the final total.

Example:
18/100= .18
.18x$23.50= $4.23 (this is the tax in $
$23.50+$4.23= $27.73
5 0
3 years ago
The nature center has a fish tank
ANEK [815]

Answer:

288 small fish.

Step-by-step explanation:

The first thing is to calculate the volume of the prism, which would be the area of the base (length by width) and that by the height, that is:

a = l * w * h

l = 6

w = 4

h = 4

Replacing

a = 6 * 4 * 4

a = 96 cubic feet

they tell us that per cubic foot there is room for 3 small fish, therefore:

96 * 3 = 288

Which means that there are 288 small fish.

4 0
3 years ago
Read 2 more answers
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