The expression \dfrac12bh ​
1/2 bhstart fraction, 1, divided by, 2, end fraction, b, h gives the area of a triangle where bbb is the base of the triangle and hhh is the height of the triangle.
What is the area of a triangle with a base of 7 \text{ cm}7 cm7, start text, space, c, m, end text and a height of 4 \text{ cm}4 cm4, start text, space, c, m, end text?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

1) add 6 to 24, write the rest of the equation 10-2x= 30 subtract 10 from 30 2x=20 divide 20 by 2 and x=102) add 3 to -9 write the rest of the equation 4x+3=-6 subtract 3 from -6 4x=-9 x= -2.25  i don't know the rest sorry