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OLga [1]
3 years ago
12

Chu-Li has $100 in her piggy bank. How much will she have in her bank 40 weeks from now if she puts $1 in the bank next week, $2

two weeks from now, $3 three weeks from now, and continues to increase the amount that she puts in by $1 each week?
Mathematics
1 answer:
BigorU [14]3 years ago
6 0

Answer:

  $920

Step-by-step explanation:

The amounts added are the arithmetic sequence ...

  1, 2, 3, ... 40

The average term of this sequence is (1 +40)/2 = 20.5. The sum of the terms of this sequence is the number of terms (40) multiplied by the average term (20.5). That product is ...

  40·20.5 = 820

Chu-Li will have added $820 to her bank in 40 weeks, so the total there is ...

  $100 +820 = $920 . . . amount Chu-Li will have 40 weeks from now

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Gordon purchased a television when his local electronics store how to sale. The television was offered at 30% of its original pr
blagie [28]

Answer:

The sale price that Gordon paid for the television is $330.4.

Step-by-step explanation:

The  original price of the Television = $472

The discount offered = 30%

So, the discount offered = 30% of the price $472

Now, 30% of $472 = \frac{30}{100}   \times 472  = 141.6

Hence, the discount offered on the television is $141.6

So, the Paid price = The actual price - The discounted Price

=  $472 - $141.6

= $330.4

Hence, the sale price that Gordon paid for the television is $330.4.

6 0
3 years ago
On one day a Plumber Joe earned $80 on a plumbing job. Out of his earnings he spent $6.85 on tea and snacks, $5.50 on food and $
In-s [12.5K]

Answer:

Joe saved 68.25

Step-by-step explanation:

Subtract 6.85 from 80, you get 73.15

Subtract 5.50 from 73.15 and you get 67.65.

Subtract 21.40 from 67.65 and you get 46.25.

Add 22 to that amount, you get 68.25.

P.S

Have an Amazing Day! I Hope this Helps and Good Luck!!

<em><u>~Faker/Tosrel</u></em>

4 0
3 years ago
Solve for x: −6 &lt; x − 1 &lt; 9
shtirl [24]

Answer:

-5

Step-by-step explanation:

-6

If a than a and u

-6

<u>⇒ Switch sides:-</u>

<u />x-1>-6

<u>⇒ Add 1 to both sides:-</u>

<u />x-1+1>-6+1

x>-5

And...

\:x-1

<u>⇒ Add 1 to both sides:-</u>

<u></u>x-1+1

x

<u>⇒ Now, Combine the intervals:-</u>

<u />-5

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3 0
3 years ago
I dont understand 5a can u please help?
tankabanditka [31]
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CDE ECD

i think thats what it is
6 0
3 years ago
Solve the system of equations and choose the correct answer from the list of options.
Igoryamba

Answer:

x = -6/5

y = -8/5

Step-by-step explanation:

2x + y = -4

Y = 3x + 2

Substitute the second equation into the first equation

2x + 3x+2 = -4

Combine like terms

5x +2 = -4

Subtract 2 from each side

5x+2-2=-4-2

5x = -6

Divide by 5

5x/5 = -6/5

x = -6/5

Now we need to find y

y = 3x+2

y = 3(-6/5)+2

y = -18/5 + 10/5

y = -8/5

5 0
3 years ago
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