Answer:
Step-by-step explanation:
In algebra we work with variables and numerals. To evaluate an algebraic expression simply means that you are going to determine the value of an expression by substituting and evaluating using the operation order.
in summary in order to evaluate an algebraic expression
- you must identify the variable and its value
- you will substitute the given value for the variable
- complete the necessary calculations
Take for example;
evaluate 2a + 4b - 2c
given that a = 2 , b = 1 , c = 5
since you already know the value of the variables you substitute them into the question
we have
2(2) + 4(1) +2 ( 5)
4 + 4 + 10
18.............. answer.
Answer:
(-3, -1/2)
Step-by-step explanation:
Plug in the numbers for x and y. If the left side of the equation is greater than the right side (0), then ordered pair is a solution to the inequality.
Hello :
<span>4x - y =3........ ×3
2x+3y = 18
I'have : 12x-3y = 9
2x +3y = 18
</span><span>by the addition method : 14 x =27
</span> x = 27/14
4(27/14)-y = 3
y = 33/7
Answer:
x = 2
y = 5
1 = 80
2= 10
3 = 100
Step-by-step explanation:
Complementary angles add to 90.
So 5(x+14) + 2(10-y) = 90. Solve for x.
5x + 70 + 20 -2y = 90
5x - 2y = 0
Supplementary angles add to 180.
So 5(x+14) + 121-3x-3y = 180. Solve for x.
5x + 70 + 121 -3x -3y = 180
2x - 3y = -11
This creates a system of equations. Solve using elimination.
5x - 2y = 0 ------> 10x - 4y =0
2x - 3y = -11 ------> 10x -15y = -55
_____________
11y = 55
y = 5
Substitute y=5 into the equation to find x.
2x - 3(5) = -11
2x - 15 = -11
2x = 4
x=2
Find the measure of each angle by substituting x = 2 and y =5 into each angle.
Answer:79
Step-by-step explanation:
