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timofeeve [1]
4 years ago
6

Suppose that the functions r and s are defined for all real numbers x as follows. HELP PLEASE

Mathematics
1 answer:
Bas_tet [7]4 years ago
3 0

Answer:

-x-3, 7x-3, -15

Step-by-step explanation:

For first 2 just add/subtract their equations. For the last one (r.s)(-1) is the same as r(s(-1)) so s(-1)=4(-1)=-4 and r(-4)=3(-4)-3=-12-3=-15

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A person invests $1000 in a bank. The bank pays 6% interest compounded monthly. To the nearest tenth of a year, how long must th
liraira [26]

Answer:

18 years, 4 months and 10 days.

Step-by-step explanation:

Given that the person invests $ 1000 in an account with compound interest each month, with an interest rate of 6%, to determine how long the investment must maintain to reach $ 3,000, the following calculation must be performed:

3,000 = 1,000 (1 + 0.06 / 12) ^ Yx12

3,000 = 1,000 (1 + 0.06 / 12) ^ 18.36x12

3,000 = 3,000

Therefore, the person must keep his investment for a period of 18.36 years. Since 12 x 0.36 is equal to 4.32, the total investment time should be 18 years, 4 months and 10 days.

8 0
3 years ago
Hey, I need help with this math problem FAST!
Pani-rosa [81]

Answer: No, No, Yes, Yes, Yes

<u>Step-by-step explanation:</u>

At 2:15 the temperature is 7°

It decreases 3° every 15 minutes  ⇒ -3

Here is a table:

time  | temperature

2:15  |  7

2:30  |  7 - 3 = 4

2:45  |  7 - 3 - 3 = 1

3:00  |  7 - 3 - 3 - 3 = -2

3:15   |  7 - 3 - 3 - 3 - 3 = -5

3:30  |  7 - 3 - 3 - 3 - 3 - 3 = -8

Do you see a pattern?  This can be written as:

                                       7 + (-3) + (-3) + (-3) + (-3) + (-3) + (-3)

                                       7 - (3)(5)

                                       7 + 5(-3)


3 0
3 years ago
A scientist is growing two species of bacteria. She defines a variable t that represents the number of days after the growth beg
ycow [4]
I want to know the answer
6 0
3 years ago
8 more than a number is greater than or equal to 0. Find the number.
Alenkinab [10]

we are given that

8 more than a number is greater than or equal to 0

Let's assume that number as 'x'

8 more than a number is

x+8

now, it is greater than or equal to 0

so, we can write as

x+8\geq 0

now, we can solve for x

Subtract both sides 8

x+8-8\geq 0-8

x\geq -8...............Answer


7 0
4 years ago
Can someone tell me how do I solve this. how is the result 2.40
liubo4ka [24]

Step-by-step explanation:

<u>Properties used</u>

  • logₐ a = 1
  • log aᵇ = b log a
  • log ab = log a + log b

See the steps below

  • - log (4*10⁻³) =
  • - (log 4 + log 10⁻³) =        (log 4 ≈ 0.6 rounded)
  • - (0.6 - 3*log 10) =
  • - (0.6 - 3*1) =
  • - (0.6 - 3) =
  • - (- 2.4) =
  • 2.4
6 0
2 years ago
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