Answer:
Step-by-step explanation:
ΔABC and ΔADB are similar (AAA).
Therefore the corresponging sides are in proportion:
Substitute:
<em>cross multiply</em>
Answer:
D. 10 x 6/2
Step-by-step explanation:
each row = 6/2
10 rows all together
so you do 10 x 6/2
200 min / $10.00 = 20 minutes / dollar
<span>300 min / $12.00 = 25 minutes / dollar </span>
<span>The cost of the 300 minute card is cheaper per minute and a better value. </span>
<span>If you don't expect to use more than 200 minutes then save your money and buy the smaller card.</span>
Use trigonometry to solve for x.
The tangent function is defined to be opposite side divided by the adjacent side.
tan(78) = x/10
tan(78)(10) = x
47.0463010948 = x
We now round off to two decimal places. In other words, we round off to the nearest tenths.
47.05 = x
Done!
Answer:
4
Step-by-step explanation:
2x+19=x+23
We simplify the equation to the form, which is simple to understand
2x+19=x+23
We move all terms containing x to the left and all other terms to the right.
+2x-1x=+23-19
We simplify the left and right sides of the equation.
+1x=+4
We divide both sides of the equation by 1 to get x.
x=4
