ABC congruent DEF find the measure of the given angles or the lengths of the given sides

m∠B = 21°

Step-by-step explanation:

Congruent triangles have equal angles, equal sides, equal perimeters, and equal areas

Let us solve the question

∵ The two triangles ABC and DEF are congruent

∴ m∠B = m∠E

∵ m∠B = 3y

∵ m∠E = 21

→ Equate their measures

∴ 3y = 21

→ Divide both sides by 3

∵ =

∴ y = 7

→ Substitute y by 7 in the measures of angle B to find it

∵ m∠B = 3(7)

∴ m∠B = 21°

no, the equation would be invalid since they are both not equal.

step-by-step explanation:

here you got

4y-6+4y 2-9

first, you would simplify the equation on the form.

4y-6+4y 2-9

then, move all the terms that contains a y to the left and all the other terms to the right.

+4y-4y+-9-6

finally, you will simplify the left and the right side of the equation.

y=-3

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50