Ask question

Ask question

All categories

3 years ago

10

Sam opened a money-market account that pays 2% simple interest. He started the account with $7,000 and made no further deposits.

When he closed the account, he had earned $420 in interest. How long did he keep his account open?

1 answer:

I am Lyosha [343]3 years ago

8 0

I = prt
420 = 7000 x .02 x t
420 = 140 x t
420/140 = 140 x t /140
t = 3 years

You might be interested in

Which Property Is Shown? k*(7-9)=(k*7)-(k*9) a. Commutative Property of Multiplication b. Multiplicative Property c. Multiplicat

Gnesinka [82]

D. Distributive Property

The distributive property allow you to multiply a sum by multiplying each addend separately.

6 0

3 years ago

Seven less than three times a number is two.

Stells [14]

Answer:

let x be the number

seven less than three times a number ==> 3x - 7

Step-by-step explanation:

6 0

3 years ago

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. Use the drop-down menus to identify the steps Lorne used to find the dif

Novay_Z [31]

Answer: Step 1: Reverse the signs of $6x^3-2x + 3$ expression.

Step 2: Removing parenthesis

Step 3: Grouping like terms

Step 4: Combing like terms

Step 5: Writing the final expression in standard form

Step-by-step explanation: First expression : $6x^3-2x + 3$

Second expression : $-3x^3+5x^2+4x-7$ .

We need to subtract $6x^3-2x + 3$ from $-3x^3+5x^2+4x-7$ .

Step 1: Reverse the signs of $6x^3-2x + 3$ expression.

$(-3x^3+5x^2+4x-7)+(-6x3+2x-3)$

Step 2: Removing parenthesis

$(-3x^3) +5x^2+4x + (-7) + (-6x^3) + 2x + (-3)$

Step 3: Grouping like terms

$[-3x^3) + (-6x^3)] + [4x + 2x] + [(-7) + (-3)] + [5x^2]$

Step 4: Combing like terms

$-9x^3 + 6x + (-10) + 5x^2$

Step 5: Writing the final expression in standard form

$-9x^3 + 5x^2 + 6x-10$

8 0

3 years ago

Read 2 more answers

Does the graph f(x)=-2x^2 -1 have a maximum or a minimum? Explain.

Serga [27]

Answer:

It has a maximum

Step-by-step explanation:

The way I think about it is looking at "a" (the leading variable's coefficient, so __x²), if it's negative, the graph is a frown, but if it's positive, it's a smile. In this case, a is -2, so the graph would have the shape of a frown, which has a maximum.

I hope this helped!

8 0

3 years ago

When you add 2 positive intergers, the answer is always positive. When you subtract 2 positive intergers, is their difference al

ololo11 [35]

Answer:

No. If the second positive integer is larger than the first positive integer in a subtraction problem, the difference will be negative.

Step-by-step explanation:

5 0

3 years ago