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3 years ago

Help me on this please

Mathematics

1 answer:

Vitek1552 [10]3 years ago

5 0

Right triangle = Pythagoras theorem.
a^2+b^2=c^2
there's already c and b so
10^2-8^2=a^2
100-64= 36
a^2=36
square root both sides
to get 6.

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What does the fraction 9/81 equal

boyakko [2]

In order for you to get the answer you must divide. Find a number the goes into both 9 and 81. You're lucky 81 is a multiple of 9. So we can use 9. So 9/81 divided by 9.
9/9=1
81/9=9

So 9/81=1/9

6 0

4 years ago

Read 2 more answers

Please solve! It's really easy (I think).

Westkost [7]

Answer:

CD = 5.2 cm
A = 27 cm²

Step-by-step explanation:

As per diagram we have:

m∠A = 30°
m∠BCD = 30°

As per 30° right triangle property:

CD = √3×CB/2 = 3√3 ≈ 5.2 cm
and
AC = 2CD = 2×5.2 = 10.4 cm

Area of triangle:

A = 1/2bh
A = 1/2CB*AC
A = 1/2*5.2*10.4 ≈ 27 cm²

8 0

3 years ago

A daycare center has 4 infants and 11 toddlers. What fraction of the children is infants?

kolezko [41]

Answer:

Option A $\frac{4}{15\\}$

Step-by-step explanation:

4 infants + 11 toddlers = 15 children

4 infants / 15 children = $\frac{4}{15}$

4 0

3 years ago

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Please help!!

Free_Kalibri [48]

Answer:

I believe it would be C, 8 squared.

Step-by-step explanation:

8 squared means to multiply 8 twice. Not by two, 8 times 8. If you do that, you will get 64. This means that 8 squared is equivalent to 64'1

3 0

3 years ago

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Suppose the demand for petrol by an average motorist is given by the following demand equation: Q = 2000P^−k, where Q is litres

GalinKa [24]

Given

The demand equation is given

$Q=2000P^{-k}$

here Q is liters purchased per year, P is the price in dollars per unit and k is a parameter =0.75.

Explanation

a. To determine the quantity of petrol demanded by the average motorist if the price is 1 dollar per liter.

$\begin{gathered} Q=2000(1)^{-0.75} \\ Q=2000\text{ /year.} \end{gathered}$

b. To determine the change in quantity demanded.

It is given that the price of petrol increases from $1.0to $2.0 per litre on a sustained basis.

Then the equation becomes

$\begin{gathered} Q_1=2000(1)^{-0.75} \\ Q_2=2000(2)^{-0.75} \end{gathered}$

The change in quantity demanded is

$\Delta Q=\frac{Q_2-Q_1}{Q_1}$

Substitute the values.

$\begin{gathered} \Delta Q=\frac{1189.2-2000}{2000} \\ \Delta Q=-\frac{810.8}{2000} \\ \Delta Q=-0.4054 \end{gathered}$ Answer

a.The quantity of petrol demanded by the average motorist if the price is 1 dollar per liter is 2000 litres per year.

b. The change in quantity demanded is the fall in demand due to negative sign which is 0.4054.

4 0

2 years ago