Answer: 46 yds².
Step-by-step explanation:
Find the area of all surfaces & add them up:
(5 · 3) + (5 · 3) + (1 · 3) + (1 · 3) + (1 · 5) + (1 · 5) = 15 + 15 + 3 + 3 + 5 + 5
= 30 + 6 + 10 = 36 + 10 = 46 square
Y =ax² + bx +c
1) Point (0,7)
7 = a*0² +b*0 +c
c = 7
y=ax² + bx + 7
2) Point (1,4)
4=a*1² + b*1 + 7, ----> 4 = a +b + 7, ------>
a+b= - 3
3) Point (2, 5)
5=a*2² + b*2 + 7, ----> 5=4a+2b +7,---> -2=4a+2b, ---->
-1=2a + b
4)
a+b= - 3, ----> b= -3 - a (substitute in the second equation)
2a+b= -1
2a - 3 - a = -1, ----> a - 3 = -1,
a =2
5) a+b= - 3
2 + b = -3
b = -5
y=2x² - 5x + 7
Answer:
y < 1.1
Step-by-step explanation:
<u>Step 1: Subtract 2.1 from both sides
</u>
-4.2y + 2.1 - 2.1 > -2.52 - 2.1
<em>-4.2y > -4.62</em>
<em />
<u>Step 2: Divide both sides by -4.2</u>
-4.2y / -4.2 > -4.62 / -4.2
<u><em>Since you divided by a negative, that flips the sign.</em></u>
<em>y < 1.1
</em>
Answer: y < 1.1