Answer:
f(4)=23
Step-by-step explanation:
f(4)=7(4)-5
=28-5
=23
to figure out this equation, all you need to do is combine like terms!
x = 1x
4x = 4x
6x = 6x
1x + 4x + 6x = 11x
Hope this helped! :D
The ratio between the lengths of 2 rectangles is the same between their perimeters
Since the ratio between the length of rectangle A and the length of rectangle B is 7: 3, then
The ratio between the perimeter of rectangle A to the perimeter of rectangle B is 7: 3 too
Since the perimeter of rectangle A is 540, then
We will write them as a fraction
By using the cross multiplication
Divide both sides by 7
Round it to the nearest tenth
The perimeter of the smaller rectangle B is 231.4 inches
Answer:
It's a
Step-by-step explanation:
This is a quadratic expression with the highest power of X being 2.
The coefficient of X² = 1
Note that the general form of a quadratic equation is aX² + bX + C
In this question,
a = 1
b = 7
C = 10
First step is to multiply a and C ( a x C)
= 1 X 10 = 10
Then, find 2 factors of 10 which can both add up to give 7, the coefficient of X given in the question.
The possible factors of 10 are 5 and 2. The sum of 5 and 2 is
5 + 2
Hence, the equation can be written as;
X² + 7X + 10 = X² + 5X + 2X + 10
The next step is to group using a bracket and factorise each bracket individually
(X² + 5X) + (2X + 10) =
X( X + 5) + 2( X + 5) =
(X + 5) (X + 2)
(X + 5) (X + 2) are the factors of the quadratic equation, X² + 7X + 10