Answer:
x = 7
y = 2
Step-by-step explanation:
In the above question, we are given 2 equations which are simultaneous. To solve this equation, we have to find the values of x and y
x + 3y = 13 ........ Equation 1
x - y = 5...........Equation 2
From Equation 2,
x = 5 + y
Substitute 5 + y for x in Equation 1
x + 3y = 13 ........ Equation 1
5 + y + 3y = 13
5 + 4y = 13
4y = 13 - 5
4y = 8
y = 8/4
y = 2
Since y = 2, substitute , 2 for y in Equation 2
x - y = 5...........Equation 2
x - 2 = 5
x = 5 + 2
x = 7
Therefore, x = 7 and y = 2
You have to plug the given input in the formula: if you substitute t with 21 you have
Answer:
$2.55
Step-by-step explanation:
If you Multiply $85 by 0.03 you get your answer because you have to turn the 3% into a decimal which you have to move the decimal two places to the left.
It depends on if the problem is multiplication or division, you do the base and add the exponents usually
Answer:
Step-by-step explanation:
you could think that 22% is close to 25% , so one forth of it, 1/4
78 percent is close to 80
1/4 of 80 is 20
actually 78*22/100=17.16
