If 2x+y=5, then y=5-2x, so he substituted 5-2x correctly.
x+4x=5x, so he combined like terms correctly.
If 5x-10=10, then 5x=10+10 -> 5x=20, so he subtracted 10 from the right side instead of adding 10 to the right side.
The answer is C.
Here's the correct solution:
Answer with Step-by-step explanation:
1.In triangle ABC
AB=BC
Let AB=BC=x and AC=y
Perimeter of triangle ABC=25
...(1)
...(2)
Adding equation (1) and (2)
Substitute x=9.67 in equation (2)
2.
By using triangle angle sum property
Substitute the values then we get
Substitute the value
(Side ST is opposite to angle R, Side RT is opposite to angle S
(side RS is opposite to angle T)
When a>b
Then , opposite side of a> opposite side of b
RS<RT<ST
3.
By using triangle angle sum property
Substitute the values then we get
Substitute the value
RT>RS
RS>ST
ST<RS<RT
115.2 pounds of type A coffee were used.
<h3>What is the solution of the equation?</h3>
A mathematical statement that has an "equal to" symbol between two expressions with equal values is called an equation.
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides. We have LHS = RHS (left hand side = right hand side) in every mathematical equation. To determine the value of an unknown variable that represents an unknown quantity, equations can be solved.
Let the number of pounds of type A coffee be x and the number of pounds of Type B coffee be y.
According to the question, the equations are,
5.50x + 4.40y = 762.30
x = 4y
So, the solution of the equation is obtained as follows:
5.50(4y) + 4.40y = 762.30
26.40y = 762.30
y = 762.30/26.40
y = 28.8 pounds
x = 4*28.8 = 115.2 pounds
Learn more about equations here:
brainly.com/question/2972832
#SPJ1
1 & 5/8 because 7/8 is closer to 1 whole than 5/8
45:60*20=15 miles the distance she traveled at 45 mph
18-15=3 miles she traveled at 20 mph
3/20=0.15 hours she traveled to reach the work
0.15*60=9 minutes
20+9=29 minutes she traveled to work
7:15+29=7:44
Kenya arrive at work at 7:44