What numbers multiply to -30 and add to -3
1 answer:
Let the numbers be x and y. Then xy = -30 and x+y = -3.
Solve xy = -30 for y: y = -30/x
subst. -30/x for y in x+y= -3: x - 30/x = -3
Multiply all 3 terms by x: x^2 - 30 = -3x, so x^2 + 3x - 10 = 0
Solve this quadratic equation for x. x: {-5, 2}
If x = -5, then x+y = -3 becomes -5 + y = -3, and y = 2.
You should check to determine whether x=2 is also correct. If it is, what is the corresponding y value?
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I’d say 5cm 7cm 5cm because it all multiples to 175cm.
No it is not possible example;
50 divided by 100 = 1/2 but,
100 divided by 50 = 2 :)
Answer:
3x + 5 = 12 - 7x
⇒ 3x = 12 - 5 - 7x
⇒ 3x = 7 - 7x
⇒ 3x + 7x = 7
⇒ 10x = 7
⇒ x= 7 ÷ 10
⇒<u> x = 0.7</u>
Answer:
espero y te sirva hay esta todo lo que necesitas
Answer:
4.66666667
Step-by-step explanation:
