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Maths - Substitution the following expressions,please help?
Using a = 2, b = 5 and c =10 ,find the value of the following expressions :
1.) a + b
2.) 3 b
3.) 6b - a
4.) 5c - 3b
5.) ab + c
6.) 2a + 5c
7.) abc
8.) 7a - c
9.) 7a - c
10.) ab + ac
Any help is appreciated and please do as many as you can.
3 Answers
- KaykouraLv 56 years ago
1. 2+5=7
2. 3x5x3=45
3. 6(5)-2 = 30 – 2 = 28
4. 5(10)-3(5) = 50-15 = 35
5. (2)(5)+10 = 10+10 = 20
6. 2(2)+5(10) = 4+50=54
7. (2)(5)(10)=100
8. 7(2)-(10)9= 14-90= -76
9. 7(2)-(10)10= 14-100 = -86
10. (2)(5) + (2)(10) = 10+20 = 30
- Anonymous6 years ago
a + b = 2 + 5 = 7
3b = 3(5) = 15
6b - a = 6(5) - 2 = 30 - 2 = 28
5c - 3b = 5(10) - 3(5) = 50 - 15 = 35
ab + c = 2(5) + 10 = 10 + 10 = 20
2a + 5c = 2(2) + 5(10) = 4 + 50 = 54
abc = (2)(5)(10) = 10(10) = 100
7a - c = 7(2) - 10 = 14 - 10 = 4
ab + ac = 2(5) + 2(10) = 10 + 20 = 30
- Anonymous5 years ago
Go fucq yourself. :)
