WHAT I KNOW Coy D. 10 1. What is the variable in the expression 10y + 5? AS B5 D.-1 2. What is the value of the expression 2x - 5 if x=2? B1 C. 9 D.X +7x2 - 4 3. Which of the following trinomial has a degree of three? A ſ-3x+45 B.X- 2x2 + 7 C. 6x - x + 10 D. - 35x+12 4. What is the difference when you subtract (14x - 16) and (21% -14)? ( A.-7x-2 B. 7x + 2 C. 35x + 12 D. 5x2 - 2x-1 - 5. What is the sum of 2x2 + 6x + 5 and 3x2 - 2x - 1 A. 5x² + 4x + 4 B. 5x2 - 4x - 4 - c. 5x² + 4x- WHAT IS IT
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Answer:
1. b
2. b
3. b
4. b
5. a
Step-by-step explanation:
1. 10y+5
find the possible divisor of the equation
so, that their is 5.
2. if X=2
2x-5
2(2)-5
4-5
=-1
since there is no -1 in there I assume that the a answer is +1
3. arrange the equation into quadratic form
X-2x²+7
-2x²-x+7
quadratic equation
-2x² so, the degree in there is 2
linear equation
-x so, the degree of x is considered 1 degree
therefore: 2+1= 3 degree
5. 2x²+6x+5+3x²-2x-1
2x²+3x²+6x-2x+5-1 note: if same sign are we going to add and if not we going to subtract the equation and copy the sign of the bigger number.
so, 5x²+4x+4