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ziro4ka [17]
3 years ago
7

Please help me with both the questions ty.

Mathematics
1 answer:
Tatiana [17]3 years ago
6 0

Answer:

4) 26+4/842-/×375-^×

5)/^9+37+×+454+12

Step-by-step explanation:

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Eighty less than three times a number?
Ivan

Answer:

30 x 3 - 80 is 10

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The line x+ 2y = 9 intersects the curve xy + 18 = 0 at the points A and B. Find the coordinates of A and B.
victus00 [196]
Subtracting the second equation by 18 on both sides, we have xy=-18. Next, we divide both sides by x to get y=-18/x  Plugging that into the first equation, we have x+2(-18/x)=9. Multiplying both sides by x, we get x^2-36=9x. After that, we subtract both sides by 9x to get x^2-9x-36=0. Finding 2 numbers that add up to -9 but multiply to -36, we do a bit of guess and check to find the answers to be -12 and 3. Factoring it, we get 
x^2-12x+3x-36=x(x-12)+3(x-12)=(x+3)(x-12). To find the x values, we have to find out when 0=(x+3)(x-12). This is simple as when you multiply 0 with anything, it is 0. Therefore, x=-3 and 12. Plugging those into x=-18/y, we get x=-18/y and by multiplying y to both sides, we get xy=-18 and then  we can divide both sides by x to get -18/x=y. Plugging -3 in, we get -18/-3=6 and by plugging 12 in we get -18/12=-1.5. Therefore, our points are (-3,6) and (12, -1.5)
6 0
3 years ago
There are 841,726 people living in a city in Africa. What is the order of magnitude of this number?
Lina20 [59]

Answer:

6

Step-by-step explanation:

There  6 digits in this number so its of magnitude 6.

8 0
3 years ago
7over 8 times 4over 9 without multiplying
posledela
11 over 13 I think is the answer
4 0
3 years ago
Your bank statement shows that you have a balance of $412.20. All the checks you have written during this statement period are o
mina [271]
Missing check = $412.20 - $331.60 = $80.6


Hope it helps!

3 0
3 years ago
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