Ahaaaaa! It is all clear to me now ! Haha
.124 kg = 124 gms
1893 mm^3 = 1.893 cm^3
124gm/1.893cm^3 = 65.5 gm/cm^3
Length of diagonals sqrt(12^2 +9^2) and sqrt(6^2 +8^2)
sqrt 225 and sqrt 100
15 10
Area is 1/2 product of diagonals (given) 1/2 (15 * 10) = 75 sq units
Is this Q written correctly?
-5x - 3y = 12y
-5x = 15y
x = -3y NONE of the options fit this equation.
Log 2^x = log 7
x log 2 = log 7
x = log7/log2 = 2.8074
2^(2x) = 2^(2*2.8074) = 49
Two right triangles with legs 5 and 12 and 9 and 12 Use pythagorean theorem to calculate and add the hypotenuses together.....
$9.00/5bulbs = $1.80 / bulb
Not sure about 'standard notation' but
6.856 x 10^6 = (move decimal 6 places to right) = 6 856 000. or 6856. x 10^3
Three stacked rectangles
top 2 x 16
middle 8 x 16
bottom 2 x 16 ft
First one:
n-3 = sqrt (5n-9) square both sides
n^2 - 6n + 9 = 5n-9 simplify
n^2 -11n +18 = 0 (now factor Hint: -9 and -2....or use Quadratic Formula
Second one is similar ......try it!