Answer:
B. 9/26.
Step-by-step explanation:
You need to change the coefficient of x in the first equation to 9/13 so that adding the 2 equations would eliminate x.
So you would multiply by
= 9/13 / 2
= 9/13 * 1/2
= 9/26 (answer)
Answer:
x=1
Step-by-step explanation:
1.Move the constant to the right
2. Calculate
3. Divide both sides
Answer:
Deborah is 31; Sarah is 27.
Step-by-step explanation:
Question:
"Deborah is x years old and Sarah is why is the sum of their ages is 58 if Deborah is 4 years older than Sarah find the ages of both women."
"sorry it is y years old."
Solution:
Deborah's age = x
Sarah's age = y
The sum of their ages is 58
x + y = 58
"Deborah is 4 years older than Sarah"
x = y + 4
We have a system of two equations.
x + y = 58
x = y + 4
The second equation is already solved for x, so we can use the substitution method.
Rewrite the first equation, and then rewrite it again substituting y + 4 for x.
x + y = 58
y + 4 + y = 58
2y + 4 = 58
2y = 54
y = 27
Now use the second original equation to solve for x.
x = y + 4
x = 27 + 4
x = 31
x = 31; y = 27
Deborah is 31; Sarah is 27.
Say I want to purchase multiple apples for $1.00 each. I could say an expression that would help me with this would be $1.00(x).
X being the amount of apples I wan't to purchase and $1.00 being the price of each apple individually.
Answer:
1.4 times as high
Step-by-step explanation:
Now here we have to compare the both final velocities by using the formula independent of time. As we know,
2aS = V(f)2 - V(i)2
Both balls are dropped from certain height, so V(i) = 0 m/s for both balls
So, 2aS = V(f)2 for both balls.
Now if we compare both velocities
Equation for first ball
2aS(1) = V(1)2
Equation for second ball
2aS(2) = V(2)2
Comparing both equations
2aS(1)/2aS(2) = V(1)2/V(2)2
as we now S(1) = 5m and S(2) = 10m, also acceleration a = g, because acceleration due to gravity is acting on the balls. So,
2(9.8) x 5/2(9.8) x 10 = V(1)2/V(2)2
after simplifying,
1/2 = V(1)2/V(2)2
V(2)^2 = 2V(1)^2
By taking square root on both sides,
V(2) = 1.4V(1)