Answer: -21x + 5y = 9
Step-by-step explanation:
The standard form says that Ax + By=C
So to covert y = 4.2x + 1.8 into subtract 4.2 from both sides.
y = 4.2x + 1.8
-4.2x -4.2x
-4.2x + 1y = 1.8 Now it is written in standard form and to make the decimals integers we will multiply both sides by 10.
-4.2x(10) + 1y(10) = 1.8(10)
-42x + 10y = 18 which reduces to -21x + 5y = 9
Answer:
54
Step-by-step explanation:
x+2x+2x=5x
90/5=18
18*3=54
1. 4*(-3)*5 = -60
2. (2.25*23)*4 = 207
3. you did not post a problem here???
4. 5*12*(-2) = -120
Answer:
A. Right triangle
Step-by-step explanation:
For problems like this, make use of the Pythagorean Theorem to determine which triangle can be formed.
Thus, there are always 3 sides in a ∆, as we've been given in the question above. The following rule can be use to find out which triangle can be formed:
1. If a² + b² = c², a right triangle is formed.
2. If a² + b² > c², an acute triangle is formed.
3. If a² + b² < c², an obtuse triangle is formed.
Where, c is always the longest side, while a and b are the 2 other shorter side lengths compared to c.
From the question given,
a = 24
b = 45, while
c = 51
Let's find out which of the 3 rules this side lengths fit in, to determine the triangle they form.
24² + 45² ? 51²
576 + 2025 ? 2601
2601 = 2601 (this fits into rule 1 stated above)
Therefore, the side lengths given in the question would form a right triangle.
