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Levart [38]
2 years ago
7

A cookie delivery company charges $0.90 per cookie plus a $3 delivery fee. If an

Mathematics
1 answer:
ss7ja [257]2 years ago
6 0

Answer:

9 cookies

Step-by-step explanation:

The equation is 11.1 = 0.9x + 3. First, we need to isolate the variable so we subtract 3 from both sides. 8.1 = 0.9x. Next we divide both sides by 0.9 which gives us 9 = x or x = 9.

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+(7p-8q+6pq)+(q-2p+pq)-(10pq-p-4q)​
lilavasa [31]

Answer:

Step-by-step explanation:

3 0
3 years ago
Sam invests £1800 in the bank for four
KIM [24]

Answer:

£2088

or

US$ 2,536.48 dollars (2021)

Step-by-step explanation:

4% of 1800 = 72

72 x 4 = 288

1800 + 288 = 2088

He has £2088 at the bank after 4 year

8 0
2 years ago
Water fills a tank at a rate of 150 litres during the first hour, 350 litres during the second, 550 litres during the third and
Alborosie
Putting this as an arithmetic sequence gives:

u_n = 150+200(n-1)

The sum of the series = 16 x 7 x 7 = 784 m^3 = 784 000 L

The sum of an arithmetic series can be written as:

S_n=n/2 [2a+(n-1)d] = 784 000
\\n/2[2(150)+(n-1)200] = 784 000
\\n[300+200(n-1)=1 568 000
\\300n+200n^2-200n = 1 568 000
\\200n^2+100n- 1 568 000 = 0
\\2n^2 +n- 15680 = 0

\\n= 88.2...,-88.7

n has to be positive, so we get

n = <u>88.2 hours (3 s.f.)</u>
3 0
3 years ago
Read 2 more answers
PLZ HELP ME I NEED HELP I WILL GIVE A BRAIN
mezya [45]
Hey!!
Here is the answer to your question
1- B
2-A
5 0
3 years ago
Simplify the expression: 19 - ( -43 )<br><br>Please help
lions [1.4K]

Simplify the expression:

answer: 62

Hope this helps! :)

~Zane

8 0
3 years ago
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