3 years ago

You have 36 coins. the ratio of heads to tails is 3 to 1. how many coins are heads?

Mathematics

1 answer:

pentagon [3]3 years ago

7 0

3 + 1 = 4. 36/4=9. 3×9=27. There were 27 heads.

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(Multiple Choice, 20 pts)

ivanzaharov [21]

Answer:

x = -3, x = 0 is a extraneous solution

Step-by-step explanation:

Step 1: Cross-multiply

3x² = 4x² + 3x

Step 2: Isolate x's

0 = x² + 3x

Step 3: Factor

0 = x(x + 3)

Step 4: Find roots

x = 0, -3

Step 5: Double check work

Plug in both to see if they both work. Only x = 0 should be extraneous. We now have our answer!

3 0

3 years ago

the forecast calls for a 30% chance of snow today and a 40% chance of snow tomorrow. what are the chances it will rain two days

egoroff_w [7]

Answer:

The chances it will rain two days in a row is 12%

Step-by-step explanation:

The forecast calls for a 30% chance of snow today

So, chance of snowfall today = 30% = 0.3

A 40% chance of snow tomorrow.

So, chance of snowfall tomorrow= 40% = 0.4

The chances it will rain two days in a row = $0.4 \times 0.3$

= $0.12$

So, percent it will rain two days in a row = $0.12 \times 100 = 12\%$

Hence the chances it will rain two days in a row is 12%

7 0

3 years ago

The image of (6. – 9) after a dilation with respect to the origin is (4,-6). What is the scale factor

qaws [65]

Answer:2/3 or .666666

Step-by-step explanation:

The dilation is a contraction

3 0

3 years ago

What is the equation of this graph? a) x=-7 b) y=-7

sergiy2304 [10]

Since it’s vertical it would be x=-7

4 0

3 years ago

3% of what number is 1.86

Illusion [34]

Answer:

Step-by-step explanation:

Of means multiply and is means equals

.03 * n = 1.86

Divide each side by .03

.03n/.03 = 1.86/.03

n =62

8 0

3 years ago