All categories

2 years ago

Help me with my math Q2

Mathematics

2 answers:

Arisa [49]2 years ago

6 0

Option 4, $3.00

Because Bobby has 15 coins in his collection, and the value of those items amounts to $127.50 in total, divide 127.5/15, so that each coin is worth $8.50 today. Sense the value of each coin has increased by $5.50 in the last few years, all you need to do is subtract 8.5-5.5 to get your answer. In conclusion, Bobby’s coins were worth $3.00 each a few years ago.

o-na [289]2 years ago

3 0

The answer is 3.

You divide the total by 15 then subtract 5.50 (pretty sure) which gives you 3

You might be interested in

Evaluate the following rational equations below, and identify which rational equation is transformable to a quadratic equation.

ladessa [460]

Answer:

2m^2 + 14m - 81 = 0

Step-by-step explanation:

It looks like

(m + 7)/9 = 18/4m

Cross-multiplication:

4m(m+7) = 9*18
2m(m+7) = 9*9
2m^2 + 14m = 81
2m^2 + 14m - 81 = 0

Here is the quadratic equation

7 0

3 years ago

Polynomial function that has the zeros -5 and 4i

Nadusha1986 [10]

Answer:

$P(x) = x^{2} + x(5-4i) - 20i$ is the required polynomial function of the form $ax^{2} + bx +c$

Step-by-step explanation:

The given zeroes of the polynomial is -5 and 4i.

It implies, the roots of the polynomial is (x+5) and (x-4i)

Now, The Polynomial = Product of all its roots

So, here P(x) = ( x + 5)( x - 4i)

or, $P(x) = x (x-4i) + 5(x-4i) = x^{2} - 4ix + 5x - 20i$

⇒ $P(x) = x^{2} + x(5-4i) - 20i$

Hence, P(x) is the required polynomial function of the form $ax^{2} + bx +c$

7 0

3 years ago

The angle of elevation of a flagpole from the foot of a building is 65⁰, what is the angle of depression of the building from th

Vadim26 [7]

Answer:

115°

Step-by-step explanation:

The angles of elevation and depression are supplementary, thus

angle of depression = 180° - 65° = 115°

6 0

3 years ago

Which expression can be used to convert 80 US dollars (USD) to Australian dollars (AUD)?

kondaur [170]

80 USD = (1.0343 x 80) AUD = 82.74 AUD

4 0

4 years ago

Find the value of x and y

Nesterboy [21]

Step-by-step explanation:

step 1. break into 2 shapes: a rectangle of sides 3 and 4. a triangle of sides (x - 3), 4, and y.

step 2. y = 4sqrt(2) (definition of a 45° triangle)

step 3. note: sqrt is the square root.

step 4. x - 3 = 4 (definition of a 45° triangle)

step 5. x = 7 (add 3 to both sides).

6 0

3 years ago