Question

Find the value of the following expressions.
a. 1a + 1; when a = -2
c. 7-7x; when x=2
e. 2a + b; when a = 1 and b= -3
b. 3x + 1;
d. 11x - 100;
& 3a +46 +56;
when x=-4
when
x = 9

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Answer 1

Answer:

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a] 1a + 1

➡️ put value of a = -2

➡️ 1×(-2)+1

➡️ -2+1

➡️ -1

b] 7-7x

➡️ put the value of x = 2

➡️ 7-7×2

➡️ 7-14

➡️ -7

c] 2a + b

➡️ put the value of a = 1 , b = -3

➡️ 2×1+(-3)

➡️ 2 -3

➡️ -1

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Answer 2

Step-by-step explanation:

a. 1a + 1; when a = -2

= 1×(-2) + 1

= -2 + 1

= -1

c. 7-7x; when x=2

= 7 -7×2

= 7 - 14

=7

e. 2a + b; when a = 1 and b= -3

= 2×1 + (-3)

= 2-3

=-1

b. 3x + 1; when X =4

= 3×4 + 1

= 12 +1

=13

d. 11x - 100; when X=9

= 11 × 9 - 100

= 99 - 100

= -1