Bob has $150 in his savings account and saves $40 per month.

question 1 options:

y = 150 + 40

y = 150x + 40

y = 40x + 150

40x = y + 150

The equation is y = 40x + 150.

Given that,

Based on the above information, the calculation is as follows:

150 + 40x

Now here y be the end amount of money

So,

150 + 40x = y

Therefore the third option is correct.

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y = 40x + 150

Step-by-step explanation:

He starts with 150.

150

He adds 40 per month. Let x represent months: so every x, he gets 40. With 2 x, he gets 80: so we multiply 40 and x and add that to his starting number.

150 + 40x

And let's represent his end amount of money with y, and set it equal.

150 + 40x = y

seems like d

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.