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Question 243630: questions
1. write in symbols the rule to find y, double x and add 1
2. her is the formula for working out the perimeter of a rectangle:
P=2(L+W)
3.a quaterley gas bill is given by the foumula C=S+NX
where C is the total cost of the bill in pence
N is the number of units
x pence is the cost per unit
(a) caulculate the value of C when S= 860, N= 152 and X= 7
(b) rewrite the foumula so that it is written in the form N=.....
4. find the value of X(X+Y) when X= -2 and Y= 1
5. if A= 1,B= 2 and C= -3, find the value of C-AB
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C+AB
6.?????????????????????? no question
7.?????????????????????? no question
8.?????????????????????? no question
9. write down an expression in terms of N and G for the total costin pence of N buns at 18 pence each and 5 bread rolls at 8 pence each
10. (a) expand (2x+1)(x+4)
2
(b) factorize completely 4x -6x
11. choc bars cost 27 pence each write down a fromula for the cost C pence of N choc bars
o
12. the air temperature, T C outside an aircraft flying at the a height of
H feet is given by the formaula T= 26 - h
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500
an aircraft is flying at a height of 27,000 feet
(a) use fomula to caulculate the air tempretue outside the aircraft
o
the temprature outside an aircraft is -52 C
(b)caulculate the height of the aircraft
please be done by 2morrow thanks from mystery girl 1
Answer by user_dude2008(1862)   (Show Source):
You can put this solution on YOUR website! Only write one problem at a time. I'll do first 5.
1. write in symbols the rule to find y, double x and add 1
y=2x+1
2. Don't know what you want here.
3.
a)
C=S+NX
C=860+152*7
C=1924
b)
C=S+NX
C-S=NX
(C-S)/X=N
N=(C-S)/X
4.
X(X+Y)=-2(-2+1)=2
X(X+Y)=2 when X= -2 and Y= 1
5.
C-AB
-3-1*2
-5
C-AB=-5 when A= 1,B= 2 and C= -3
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