Answer:
The number is 4.
Step-by-step explanation:
The difference of twice a number and 12 is 2x - 12.
Multiplying by 5 gives 5(2x - 12)
So 5(2x - 12) = -20
Solving for x
10x - 60 = -20
10x = -20 + 60 = 40
x = 40/10
x = 4.
Answer:
y
=
2
5
x
+
2
Explanation:
The equation of a line in
slope-intercept form
is.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
y
=
m
x
+
b
2
2
∣
∣
∣
−−−−−−−−−−−−−−−
where m represents the slope and b, the y-intercept.
here
m
=
2
5
and
b
=
2
⇒
y
=
2
5
x
+
2
is the equation of the line
Step-by-step explanation:
y
=
2
5
x
+
2
Explanation:
The equation of a line in
slope-intercept form
is.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
y
=
m
x
+
b
2
2
∣
∣
∣
−−−−−−−−−−−−−−−
where m represents the slope and b, the y-intercept.
here
m
=
2
5
and
b
=
2
⇒
y
=
2
5
x
+
2
is the equation of the line
x² + bx - 81
there are 2 formula that fit this equation :
>> x² - a² = (x+a)(x-a)
or
>> x² + 2ax² + a² = (x+a)(x+a)
because the last value of our equation is negative value therefore we have to use the first formula >> x² - a² = (x+a)(x-a)
step:
x² + bx - 81
x² + bx - 9²
because we have to follow the first formula x² - a² therefore bx = 0
x² + bx - 9²
bx = 0
b = 0
Answer:
Aziz's money was $30
Osman's money was $15
Step-by-step explanation:
Let
x-----> Aziz's money at first
y-----> Osman's money
we know that
------> equation A
-----> equation B
substitute equation A in equation B and solve for y
Find the value of x
therefore
At first
Aziz's money was $30
Osman's money was $15
Answer:
5x² - 10x - 15 = 0
Step-by-step explanation:
Given that the roots are x = 3 and x = - 1, then the factors are
(x - 3) and (x + 1) and the quadratic is the product of the factors, that is
f(x) = a(x - 3)(x + 1) ← a is a multiplier
Here a = 5, thus
f(x) = 5(x - 3)(x + 1) ← expand factors using FOIL
= 5(x² - 2x - 3) ← distribute parenthesis by 5
= 5x² - 10x - 15
Thus equation is
5x² - 10x - 15 = 0
