163-x=-52
first subtract 163 and you get -215
now it looks like -x=-215
then the negative signs cancel out and its now x=215
Answer:
35 mph
Step-by-step explanation:
time = distance / speed
210 miles and has an average of a certain speed
t = 210 / s
If the average speed had been 3mph more, he could have traveled 228 miles in the same length of time
t = 228 / (s + 3)
Set equal
210 / s = 228 / (s + 3)
Cross multiply
210s + 630 = 228s
Subtract 210s from both sides
630 = 18s
Divie both sides by 18
35 = s
35 mph
<u>Metric: </u>
Distance: Centimeters (cm), Meters (m), Kilometers (km)
Weight: Milligrams (mg), Grams (g), Kilograms (kg)
Volume: Milliliters (mL), Liters (L)
<u>Customary: </u>
Distance: Inches (in), Feet (ft), Yards (yd), Miles (mi)
Weight: Ounces (oz), Pounds (lbs), Tons (T)
Volume: Cups (c), Pints (pt), Quarts (qt), Gallons (gal)
The hypotenuse of the triangle would be the diameter of the semi circle.
Using the Pythagorean theorem you can find that.
8^2 + 6^2 = x^2
64 +36 = x^2
100 = x^2
x = √100
x = 10
The diameter is 10, now find the circumference.
Circumference = diameter x PI = 10 x 3.14 = 31.4
Since it is a semi circle, the circumference would be 1/2 of that.
31.4 / 2 = 15.7
The perimeter would be 8 + 6 + 15.7 = 29.7
