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3 years ago

Which equation can be used to find y, the year in which

Mathematics

1 answer:

Rasek [7]3 years ago

5 0

Answer:

Step-by-step explanation:

According to the problem, both expression are equal because they have the same amount of mercury.

When the problem specifies an initial value, this means that value is not with the variable, because is an initial constant. When the problem specifies a rate, this is a coefficient of the variable, which expresses time (years.)

So, 0.05 parts per billion with a rate of 0.1 means: 0.05 + 0.1y, because the ratio is rising, that means is positive.

Similarly, 0.12 parts per billion with a rate of 0.06 means: 0.12 + 0.06y, because the ratio is also increasing, is positive.

Therefore, the right answer is C.

You might be interested in

A third grade class has 16 girls and 15 boys a fourth grade class has 18 boys and 15 girls when picking for PE captains will mak

Mkey [24]

Answer:

$\dfrac{90}{341}$

Step-by-step explanation:

3rd grade:

Number of girls = 16

Number of boys = 15

Total number of students = 31

4th grade:

Number of girls = 15

Number of boys = 18

Total number of students = 33

Formula for probability of an event <em>E</em> can be observed as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

Probability of picking a boy from <em>3rd grade</em>, $P_{1} = \dfrac{15}{31} ..... (1)$

Probability of picking a boy from <em>4th grade</em>, $P_{2} = \dfrac{18}{33} ..... (2)$

These are two independent events of picking a boy from 3rd grade and 4th grade.

So, probability the captain chooses 2 boys in the first pick can be found by multiplying (1) and (2) above.

$P = P_{1} \times P_{2}\\\Rightarrow \dfrac{15}{31} \times \dfrac{18}{33}\\\Rightarrow \dfrac{90}{341}$

3 0

3 years ago

Read 2 more answers

Plz help I don’t understand

adell [148]

So Kalinda starts with $25. Then she spends $14.28. This means you subtract since she spends it. Next, she shares $2.65. Again, use subtraction. The remainder is your answer. Or you can add 14.28 to 2.65 and then subtract that from 25.

3 0

3 years ago

A study at a major university concluded that many students are cheating. The circle graph depicts the percentages of students wh

ehidna [41]

ANSWER: its going to be 225 because all you have to do is find what to multiply by to get 675 and its 225 x 5= 675

Step-by-step explanation:

6 0

4 years ago

Find the solution of the system of equations.<br> - 7x – 4y = -44<br> 7x - 3y = 16

lys-0071 [83]

Answer:

{x,y} = {5,8}

Step-by-step explanation:

[1] 7x-3y+5=16

[2] 4y=3x+17

[1] 7x - 3y = 11

[2] -3x + 4y = 17

// Solve equation [2] for the variable y

[2] 4y = 3x + 17

[2] y = 3x/4 + 17/4

// Plug this in for variable y in equation [1]

[1] 7x - 3•(3x/4+17/4) = 11

[1] 19x/4 = 95/4

[1] 19x = 95

// Solve equation [1] for the variable x

[1] 19x = 95

[1] x = 5

// By now we know this much :

x = 5

y = 3x/4+17/4

// Use the x value to solve for y

y = (3/4)(5)+17/4 = 8

6 0

3 years ago

Determine which ordered pair is a solution of y = x2-2.

hodyreva [135]

Answer:

(-1 , -1)

Step-by-step explanation:

y = x²-2

(-1 , -1)

y = (-1)² - 2 = 1 - 2 = -1

7 0

3 years ago