3 years ago

Can you help me with this question?

1 answer:

6 0

Assuming you are focusing on the square only, then the answer is 9 inches.

You take the square root of 81 to get 9. Notice how 9^2 = 9*9 = 81. So if you're not familiar with square roots, then think backwards in a sense to get the answer.

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Which algebraic expression is a polynomial with a degree of 2?

Tpy6a [65]

Answer:

Step-by-step explanation:

The highest power of X in D is 2; hence we see

6x^2 - 6x + 5

7 0

3 years ago

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A particle moves so that r(t) = ati + b sin atj. Show that the magnitude of the acceleration of the particle is proportional to

ValentinkaMS [17]

Answer:

Step-by-step explanation:

Given

Position of particle is $r(t)=at\hat{i}+b\sin (at)\hat{j}$

i.e. distance from x axis is $b\sin (at)---1$

Distance from y axis at

velocity is given by $v=\frac{\mathrm{d} r}{\mathrm{d} t}$

$v=a\hat{i}+ba\cos (at)\hat{j}$

Similarly acceleration is given by

$a=\frac{\mathrm{d} v}{\mathrm{d} t}$

$a=0\hat{i}-a^2b\sin (at)\hat{j}$

Magnitude of acceleration is $=\sqrt{(-a^2b\sin (at))^2}$

$=a^2b\sin (at)----2$

From 1 and 2 we can see that

Magnitude of acceleration is proportional to distance from x axis

$a\propto distance\ from\ x-axis$

5 0

3 years ago

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The original price of a Shirt was $45. In sales, the shirt is reduced to $32.50. Calculate the percentage reduction.

Klio2033 [76]

Answer:

27.8%

Step-by-step explanation:

$\frac{32.5}{45} =0.722$

0.722 = 72.2%

The % reduction is:

(100-72.2)% = 27.8%

Hope this helps

8 0

2 years ago

six coins in your pocket: 5 cents, 10 cents, 20 cents, 50 cents, $1, $2. How many different sums of money can you make?

TEA [102]

Answer:

You can make 64 different sums (which includes a sum of $0 using none of the coins).

Step-by-step explanation:

The number of sums you can make is equal to:

⁶C₀ + ⁶C₁ + ⁶C₂ + ⁶C₃ + ⁶C₄ + ⁶C₅ +⁶C₆ = 1 + 6 + 15 + 20 + 15 + 6 + 1 = 64

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3 years ago

What is the value of 1/2 ÷ 1/3? Use pattern blocks to represent and find this value. The yellow hexagon represents 1 whole. Expl

ziro4ka [17]

1/2 x 3 = 3/2 or 1.5 or 1 1/2

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3 years ago