0.7 is RATIONAL. A rational is a number or decimal that stops or ends. Irrational is a number or decimal that never ends. Hope this helps!
Answer:
Step-by-step explanation:
Since moving it to one side can't be factored, I'm going to complete the square.
Since <span><span>secx</span>=<span>1<span>cosx</span></span></span>,
the first member becomes
<span><span><span><span>1<span>cosx</span></span>−1</span><span>1−<span>cosx</span></span></span>=<span><span><span>1−<span>cosx</span></span><span>cosx</span></span><span>1−<span>cosx</span></span></span>=<span>1<span>cosx</span></span>=<span>secx</span></span>.
a.
b=cost per burrioto
t=cost per taco
b.
3 burritos and 4 tacos costs 11.33; 3b+4t=11.33
9 burritos and 4 tacos costs 22.07; 9b+4t=22.07
c. solve
3b+4t=11.33
9b+4t=22.07
mulitply irst equation by -1 and add to 2nd to cancel t's
-3b-4t=-11.33
<u>9b+4t=22.07 +</u>
6b+0t=10.74
6b=10.74
divide both sides by 6
b=1.79
subsitute back
3b+4t=11.33
3(1.79)+4t=11.33
5.37+4t=11.33
4t=5.96
divide both sides by 4
t=1.49
solution: 1 taco costs $1.49 and 1 burrito costs $1.79
Answer:
Step-by-step explanation:
-4x + 2y = -30
-2x + 2y = -10
-4x + 2y = -30
2x - 2y = 10
-2x = -20
x = 10
-2(10) + 2y = -10
-20 + 2y = -10
2y = 10
y = 5
(10, 5)
