Answer:
Step-by-step explanation:
radius=4 as it is tangent to x-axis.
y co-ordinate of center is 4 so radius=4
eq. of circle is (x-2)²+(y-4)²=4²
or x²-4x+4+y²-8y+16=16
or x²+y²-4x-8y+4=0
Answer:
X^2+3X-10
Step-x^2by-step explanation:
Answer: B
Step-by-step explanation:
To isolate x, you divide both sides by 21
21x=7
x = 7/21
Simplify by dividing both the numerator and denominator by 7
x = 1/3
Since, 1/3 is not an option, B is the correct answer
Answer:
19 cows and 3 chickens
18 cows and 5 chickens
17 cows and 7 chickens
16 cows and 9 chickens
15 cows and 11 chickens
Step-by-step explanation:
For example, the first one
19 cows x 4 legs=76 legs and
3 chickens x 2 legs= 6 legs
