Given:
The equation is
To find:
The value of x.
Solution:
We have,
It can be written as
Cancel out the common factors.
Therefore, the value of x is -3.
Hmm
(a+b)^2=(a+b)(a+b)=a^2+2ab+b^2
basically
for
ax^2+bx+c
it is a perfect trinomial when
b=2(√a)(√c)
remember to take both positive and negative roots into consideration
because
(a+b)^2=a^2+2ab+b^2 and
(a-b)^2=a^2-2ab+b^2
see each
first one
-70=2(9)(4)
-70=72
false
second
-90=2(8)(5)
-90=80
false
third
-72=(9)(4)
-72=72
false
but, the last one could be negative
(9x-4)^2 is factor
that is the answer
the answer is 81x^2-72x+16
Answer:
Part a) Tim has completed the greater amount of work
Part b) They have completed together of the project or of the project
Step-by-step explanation:
Part a) Who has completed the greater amount of work?
we have
Jaime has 5/11 of a project completed
Tim has 7/13 of a project completed
Multiply 5/11 by 13/13 and 7/13 by 11/11
so
Jaime --->
Tim --->
Remember that
When fractions have the same denominator, the larger fraction is the one with the larger numerator
therefore
Tim has completed the greater amount of work
Part b) How much of the project have they completed together?
we have that
Jaime has 65/143 of a project completed
Tim has 77/143 of a project completed
Sum the fraction of the project completed by Jaime plus the fraction of the project completed by Tim
Convert to percentage
Multiply by 100
Consider this solution:
the only solution is (-1;-1), it is intersection point.
Answer:
Speed = 25miles per hour
Step-by-step explanation:
Represent the time with x and the distance with y
So, from the attachment; we have the following details:
Required
Determine the constant speed
Because the train travelled at a constant speed, the speed can be calculated using:
Notice that the result of each division is the same.
Hence, the constant speed is:
Speed = 25miles per hour