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Natali [406]
3 years ago
15

Evaluate each expression 2+-4–4

Mathematics
2 answers:
larisa [96]3 years ago
6 0
The answer is -6 I believe
sergey [27]3 years ago
5 0
i think the answer is -6.
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Grade 9 maths!!! Due tonight
Artyom0805 [142]

Answer:

a. 7 by 21

b. a(-12, 2), b(-12, -5), c(9, -5)

Step-by-step explanation:

AD is 3 times the length of AB. X can be the length of AB. Then 3x would be the length of AD. The perimeter is 56, which would also be 3x + x + 3x + x which is 8x. This gives us 8x = 56, meaning that x is 7, or the length of AB is 7. Because AD is 3 times the length of AB (which is 7), AD = 21. Therefore, the dimensions of the rectangle ABCD is 7 by 21.

Coordinates of A have to be 21 units away from D since AD = 21. It goes in the left direction, meaning that 21 is subtracted from 9 (since this is a horizontal edge involving x coordinates) while the y value remains the same. The result is (-12, 2). For coordinate B, it has to be 7 units away from A downwards since AB = 7. This means that you subtract 7 from 2 (involving only the y coordinates), resulting in (-12, -5). For coordinate C, it has to be 21 units from B since BC = AD = 21.  Because C is right compared to B, you have to add 21 to -12 (involving only the x coordinate) resulting in (9, -5).

3 0
2 years ago
Jordan keeps track of rainy days for one year. This year he counted 27 weeks with at least 1 rainy day. How many weeks had no ra
Komok [63]
There are 52 weeks in a year, so subtract 27 from 52.

52-27=25

There were 25 weeks with no rainy days
3 0
3 years ago
What number u satisfies the equation sqrt{100u-100}=100?
kifflom [539]
The answer is 101
100 squared is 10,000
Then form an equation
100u-100=10,000
        +100    +100
100u=10,100
divide by 100 on both sides
and you get 101 as the answer
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I belive it is the second i'm taking the test
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