Step-by-step explanation:
Reduce = Deduct = Subtract
7y + 2y^2 - 7 - (3 - 4y)
distribute the negative sign outside 3-4y.
7y+2y^2-7 - 3 + 4y
collect like terms, meaning try to make similar components of the equation together at one place.
7y & 4y are like terms in this case.
7y + 4y + 2y^2 - 7 - 3
11y + 2y^2 - 10
rewrite 2y^2 infront of the equation because it has the highest degree which is 2.
2y^2 + 11y - 10
Answer:
112 in^2
Step-by-step explanation:
The equation to calculate the area of a circle is A=πr^2. We can solve for the radius of the circle by:
1) plugging in our known value, A=7. So 7=πr^2
2) dividing both sides by π.
7/π=r^2
3) square rooting both sides.
Sqrt(7/π)=r
Plug that into a calculator and you get about 1.4927
Now we multiply that by 4, giving us our new radius of about 5.9708
Plugging that number back into the equation A=πr^2 as r will give us 112.
The distance between the points X(−4,3) and Y(2,−7) rounded to the nearest tenth is 11.7 units
<h3>Distance between two points</h3>
The formula for calculating the distance between two points is expressed as:
D = √(y2-y1)²+(x2-x1)²
Given the coordinate points X(−4,3) and Y(2,−7)
Substitute
XY = √(-7-3)²+(2+4)²
XY = √(-10)²+(6)²
XY = √100+36
XY = √136
XY = 11.7 units
Hence the distance between the points X(−4,3) and Y(2,−7) rounded to the nearest tenth is 11.7 units
Learn more on distance here: brainly.com/question/17273444
#SPJ2
Answer:
0, 1, 1/2, 22/7, 12345/67, and so on.
Step-by-step explanation:
i just took the test!
Answer:
x = -3
Step-by-step explanation:
y = -x + 2
7x + 4y = -1
Subsitution method: (Substitute y)
7x + 4(-x+2) = -1
Expand.
7x + (-4x + 8) = -1
One plus and one minus make one minus. Two plus makes a plus.
7x -4x + 8 = -1
Simplify.
3x + 8 = -1
Isolate 3x.
3x = -1-8
= -9
Find x.
x = -9 ÷ 3
= -3