<u>Answer:</u>
<em> -41r - 16</em>
<u>Step-by-step explanation:</u>
<em>Step 1 :</em>
<em>Step 2 :</em>
<em>Pulling out like terms :</em>
<em> 2.1 Pull out like factors :</em>
<em> -5r - 2 = -1 • (5r + 2) </em>
<em>Equation at the end of step 2 :</em>
<em> -r + -8 • (5r + 2)</em>
<em>Step 3 :</em>
<em>Step 4 :</em>
<em>Pulling out like terms :</em>
<em> 4.1 Pull out like factors :</em>
<em> -41r - 16 = -1 • (41r + 16) </em>
Answer:
C. 9
Step-by-step explanation:
y = -4x^2 + 2kx
subtitute 3:
y = -4(9)^2 + 2k(9)
y = -4(81) + 18k
let y = 0
=> 0 = -324 + 18k
=> k = 324/18 = 9
this is my calculations hope it helps
It’s an isosceles triangle so it’s 4
Wish I could help on so sorry
Answer:
By using the rule that the interior angles of any triangle equal 180 we see that:
m<ABC+m<CAB+m<ACB=180°
Therefore,
(2x+15)+(x+10)+(3x+5) = 180°
Now we have an equation and can solve for x:
Combine like terms:
(2x+15)+(x+10)+(3x+5) = 180°
6x+30=180°
6x+30-30=180-30
6x=150
x=25
To check our work just plug in 25 for x in each equation and the sum of those answers should add up to 180:
2x+15
2(25)+15
65
x+10
25+10
35
3x+5
3(25)+5
75+5
80
65+35+80=180
x=25 is valid
Step-by-step explanation:
