Answer:
24 and 6 are the 2 numbers
Step-by-step explanation:
let the 2 numbers be x and y , then
x + y = 30 → (1)
y = 4x → (2) [ one number is 4 times the other ]
Substitute y = 4x into (1)
x + 4x = 30
5x = 30 ( divide both sides by 5 )
x = 6
Substitute x = 6 into (2)
y = 4 × 6 = 24
The 2 numbers are 24 and 6
2x^2+7x-4=0
Δ=7^2-4*2*(-4)
Δ=49+32
Δ=81
x1=(-7+V81)/4=(-7+9)/4=2/4=1/2
x2=(-7-9)/4=-16/4=-4
the solutions: x1= 1/2 and x2= - 4
Answer:
x<7
Step-by-step explanation:
−8x+40>−16
Step 1: Subtract 40 from both sides.
−8x+40−40>−16−40
−8x>−56
Step 2: Divide both sides by -8.
−8x / −8 > −56 / −8
x<7
Answer:
-14
Step-by-step explanation:
8x-y²-3
8(-1/4) - (3)² - 3
-2 - (9) - 3
= -14
Rs.1680
Liter. Rs
————-|————-
25 | 1400
:5( | ):5
5 | 280
x6( | )x6
30 | 1680
