Answer:
0.8x + 35 = -7x - 43
The number is -10.
Step-by-step explanation:
Let x = the number.
0.8x + 35 = -7x - 43
7.8x = -78
x = -10
Y = 1/4x....slope here is 1/4. A perpendicular line will have a negative reciprocal slope. To find the negative reciprocal, " flip " the number and change the sign. So the negative reciprocal for our perpendicular line is -4.
y = mx + b
slope(m) = -4
(2,-5)...x = 2 and y = -5
now we sub and find b, the y int
-5 = -4(2) + b
-5 = -8 + b
-5 + 8 = b
3 = b
so ur perpendicular equation is : y = -4x + 3
Look at the x value, when it equals one.
We see that y = 0
Answer: y = 0
Answer:
32 cm^2
Step-by-step explanation:
The sides of ∆DBE or 1/4 of the sides of ∆ABC, so its area is (1/4)^2 = 1/16 of the area of ∆ABC. The trapezoid's area is then 1 -1/16 = 15/16 of the total area of ∆ABC. Said another way, the area of ∆ABC is 16/15 times the area of the trapezoid.
Area ∆ABC = (16/15)·(30 cm^2) = 32 cm^2