1. k = 2<span>2.5</span><span>
2. xy=k
thats what i got</span>
Answer:
-29
Step-by-step explanation:
-5x^2-6y^2
substitute the x and y values
-5(1)^2-6(2)^2
-5-6*4
-5-24
-29
Answer:
91
Step-by-step explanation:
Distribute the 7 (7*4+7*9) then add which is 91
Answer:
First, we can make a proportion to find y
12/3=y/5
Cross multiply
3*y=12*5
3y=60
Divide both sides by 3
y=20
Next, we can use Pythagorean theorem to find x
a^2+b^2=c^2
a and b are the legs, and c is the hypotenuse
We know a is 15(12+3), b is x, and c is 25(20+5)
15^2+x^2=25^2
225+x^2=625
Subtract 225 from both sides
x^2=400
Take the square root of both sides
x=20
Answer:
9
Step-by-step explanation:
(9*1) + (9*4) = 9*(1+4)