Step-by-step explanation:
for 15 =6
75=?(x)
15x=75×6
15x=450
x=450/15
x=30
Rob saved $30
Answer:
The final answers are x = 10.385 OR x = -0.385
Step-by-step explanation:
Given the equation is x^2 -4 = 10x
Rewriting it in quadratic form as:- x^2 -10x -4 = 0.
a = 1, b = -10, c = -4.
Using Quadratic formula as follows:- x = ( -b ± √(b² -4ac) ) / (2a)
x = ( 10 ± √(100 -4*1*-4) ) / (2*1)
x = ( 10 ± √(100 +16) ) / (2)
x = ( 10 ± √(116) ) / (2)
x = ( 10 ± 10.77 ) / (2)
x = ( 10 + 10.77 ) / (2) OR x = ( 10 - 10.77 ) / (2)
x = 20.77/2 OR x = -0.77/2
x = 10.385 OR x = -0.385
Hence, final answers are x = 10.385 OR x = -0.385
Answer:
(5,38)
Step-by-step explanation:
<u><em>The correct question is</em></u>
A system of equations is shown below:
y = 8x − 2
y = 9x − 7
What is the solution to the system of equations?
(−5, 38)
(−5, −38)
(5, 38)
(5, −38)
we have
----> equation A
----> equation B
Solve the system by substitution
substitute equation B in equation A
solve for x
<em>Find the value of y</em>
Substitute the value of x in the equation A or in the equation B
therefore
The solution is the point (5,38)
No because he didn't explain it.
