Step-by-step explanation:
Algebra is great fun - you get to solve puzzles!
A Puzzle
What is the missing number?
− 2 = 4
OK, the answer is 6, right? Because 6 − 2 = 4. Easy stuff.
Well, in Algebra we don't use blank boxes, we use a letter (usually an x or y, but any letter is fine). So we write:
x − 2 = 4
It is really that simple. The letter (in this case an x) just means "we don't know this yet", and is often called the unknown or the variable.
And when we solve it we write:
x = 6
The lengths of sides of second triangle are:
10cm, 18cm and 22cm
Step-by-step explanation:
Given
Ratios of sides of triangle=> 1:2
Given sides of a triangle:
5cm,9cm and 11 cm
The ratio 1:2 means that for each 1 cm in first triangle, there are 2 cms in seconds triangle. This simply means that the sides of the second triangle are double of the first triangle.
So,
The sides of the second triangle are:
Hence,
The lengths of sides of second triangle are:
10cm, 18cm and 22cm
Keywords: Triangles, ratios
Learn more about ratios at:
#LearnwithBrainly
Even negative.
- even because both graph ends point in the same direction
- negative because they point down
The x- intercept is where y = 0 on the graph and the y- intercept is where x= 0 on the graph. When X=0, all the terms, except for the constant are equal to zero, thus the y- intercept is the constant. y=10 when x=0. Use the quadratic formula to find the x value where y=0.
x= (-b +or- sqrt(b^2 -4ac))/2a
y=ax^2 +bx +c
The answer for the x- int is imaginary. This happens because 10 is the parabola's minimum value and it never touches the x- axis. y-int is 10
Answer:
88°
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Geometry</u>
- Sum of Angles: 180(n - 2)°
Step-by-step explanation:
<u>Step 1: Identify</u>
We have a polygon, so n = 4.
- Substitute [SA]: 180(4 - 2)°
- (Parenthesis) Subtract: 180(2)°
- Multiply: 360°
This tells us the sum of all angles in the shape.
<u>Step 2: Solve for </u><em><u>x</u></em>
- Set up equation: 90° + 93° + 89° + x° = 360°
- Combine like terms: x° + 272° = 360°
- Isolate <em>x</em>: x = 88°
