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Serjik [45]
4 years ago
11

Could i please get some help to Evaluate -a- (−8)+b where a =2 and b = -7

Mathematics
2 answers:
gregori [183]4 years ago
8 0
Hello. 

Plug in the variables. 

-2 - (-8) + -7 = - 1

You're welcome. 


Igoryamba4 years ago
3 0
Answer: -1

Explanation:
-a - (-8) + b 
-a + 8 + b (because the - - signs cancel out)
-(2) + 8 + (-7) 
-2 + 8 - 7 = -1
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8 0
3 years ago
john currently has enough money to buy 45 books. If the cost of each book was 10 cents less.john could buy 5 more books. How muc
SVEN [57.7K]
Let the cost of one book= x cents
Let the money john have= y cents

According to the question,

45x=y                                               ...eq(1)
(45+5)(x-5)=y                                  
50(x-5)=y                                         
50x-250=y                                        ...eq(2)

On subtracting (1) from (2).
(50x-250)-45x=y-y
5x-250=0
x=250/5
x=50

Thus, cost of each book is 50 cents and john has 2250 cents.

Hope it helps.
Don't feel shy in saying thx if it helps.


4 0
4 years ago
Leah's house has a media room with a large flat-screen television to watch movies. The media room television has a width of 8 fe
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The Answer Would Be 64 because if you divide 8/4.5 its equal to 64/36.
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4 years ago
There are 6 marbles in a bag. are blue and 2 are red. What is the probability of
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3 is to 2 is the probability of drawing 4 marbles that are all blue.

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3 years ago
Margot purchases book tees from the warehouse and marks up those prices by 20% for retail sale when tease go on sold for more th
rusak2 [61]
No she's not correct,,,
If the teas are $50 to start with 20% up from $50 is $62.50
if she counts down 20% down from that it wouldn't be $50 but be $40.
So she would not break even.

6 0
3 years ago
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