Answer:
x=15
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
9x−38+4x+23=180
9x+−38+4x+23=180
(9x+4x)+(−38+23)=180(Combine Like Terms)
13x+−15=180
13x−15=180
Step 2: Add 15 to both sides.
13x−15+15=180+15
13x=195
Step 3: Divide both sides by 13.
13x/13=195/13
J=john
m=mary
j is 2 times as old as mary
j=2 times m
sum is 21
m+j=21
find mary
subsitute
j=2m therefor subsitute 2m for j
m+2m=21
add like terms
3m=21
divide by 3
m=7
mary=7
*HOPE I HELPED!*
Answer:
y=1.5x-5
Step-by-step explanation:
First, we solve for the slope. The slope can be found by dividing the change in y by the change in x. We take:
(4,1)
(2,-2)
change in y: 1-(-2) = 3
change in x: 4-2 = 2
therefore, the slope is 3/2, or 1.5.
Second, we solve for the y-intercept (the b in mx+b).
Because we know that the slope is 1.5, we can simply plug it into a coordinate to find the y-intercept.
Let's take the coordinate (4,1).
4 is the x-coordinate, so we multiply by 1.5 (because the equation is of the form mx+b, m being slope and x being the x-coordinate value). The product is 6.
We know that 6 + b = 1. b must, therefore, be -5.
We plug it into the second coordinate to check.
2*1.5 = 3. 3-5 = -2. This is correct!
The equation for the given points is y=1.5x-5
Answer:
45
Step-by-step explanation:
The average of the three numbers is the middle one: 138/3 = 46. Then the smallest of the three consecutive numbers is 45.
I- I did all the work and got 0
