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lara31 [8.8K]
3 years ago
7

(3x – 5 – 7x2) – (–2 + 6x2 – 5x)

Mathematics
1 answer:
Gemiola [76]3 years ago
6 0

Answer:

8x-13x²-3

Step-by-step explanation:

you first have to work with the negative sign and the brackets by multiplying the negative sign by everything in the second brackets

3x-5-7x²+2-6x²+5x

then group the like terms

3x+5x-7x²-6x²+2-5

8x-13x²-3

I hope this helps

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galina1969 [7]

Answer:

17(maybe)

Step-by-step explanation:

12-(-5)=17

8 0
3 years ago
For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a beverly hi
AleksAgata [21]
The probability any one system works is 0.99
So the probability of any one system failing is 1-0.99 = 0.01, so basically a 1% chance of failure for any one system

Multiply out the value 0.01 with itself four times
0.01*0.01*0.01*0.01 = 0.000 000 01
I'm using spaces to make the number more readable
So the probability of all four systems failing is 0.00000001
Subtract this value from 1 to get
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The answer is 0.99999999 which is what we'd expect. The probability of at least one of the systems working is very very close to 1 (aka 100%)
7 0
3 years ago
Si a es la raíz cuadrada de b ¿también - a será la raíz cuadrada de b?​
Anuta_ua [19.1K]

Answer:

si

Step-by-step explanation:

si

4 0
3 years ago
(6ab-8a+8) - (7ab-1 )
PSYCHO15rus [73]

Answer:

- ab - 8a + 9

Step-by-step explanation:

(6ab - 8a + 8) - (7ab - 1) \\ 6ab - 8a + 8 - 7ab + 1 \\  - ab - 8a + 9

hope this helps you.

4 0
3 years ago
Read 2 more answers
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wariber [46]
2/10. 3-1/10 = 2/10.
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