−4(5 − 3x) = 12x + 20
Solve for x:
First use the Distributive property:
-20 + 12x = 12x +20
Add 20 to both sides:
12x =12x + 40
Now you can't get X by itself, because both sides of the equation have the same quantity of x ( they both have 12x).
This means there is no solution.
the maximum height is the y-value of the vertex.
h(x) = -2x² + 20x + 48
<em> a=-2, b=20, c=48</em>

h(5) = -2(5)² + 20(5) + 48
= -50 + 100 + 48
= 50 + 48
= 98
Answer: 98 meters
3 times the product of 5 and b is reduced by 2
3*(5*b)-2
15b-2
Malcolm maximum speed is 200 km/h and Ravi maximum speed is 320 km/h
Step-by-step explanation:
Lets assume Malcolm maximum speed to be M km/h and Ravi maximum speed to be R km/h
Average of their maximum speed is; (M+R)/2 =260 km/h
This can be simplified to M+R= 260*2
M+R = 520.......................................(I)
When Malcolm's speed is doubled,
2M=R+80 km/h ----------------------(ii)
The two equations are;
M+R = 520 ------ M=520-R ----(i)
2M=R+80 ---------------------------(ii)
Replacing M with (i) above
2M=R+80
2(520-R) =R+80
1040 -2R =R+80
1040-80 = R+2R
960 = 3R
960/3 =R
320 =R
M+R =520
M=520-320 =200
Malcolm maximum speed is 200 km/h and Ravi maximum speed is 320 km/h
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Simultaneous equations:brainly.com/question/12919422
Keywords: Average, maximum, speeds, doubled,
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