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elena-s [515]
4 years ago
5

if the difference a number and four is tripled, the result is six less than the number. Find the number.

Mathematics
1 answer:
SCORPION-xisa [38]4 years ago
4 0
3 (n-4) = n-6
3n - 12 = n - 6
3n - 12 + 12 = n - 6 + 12
3n - n = n + 6 -n
2n = 6
n = 3

* Hope that helped :)



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A circular garden has a circumference of 88 yards. Lars is digging a straight line along a diameter of the garden at a rate of 7
ankoles [38]

Answer:

It will take 4 hours to dig in the garden

Step-by-step explanation:

First we have to calculate the diameter, for this we will use the formula to calculate the circumference of a circle and we will clear the diameter

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c = circumference

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d = 88yd / 3.14

d = 28.025yd

round to the nearest whole number

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To know how many hours it takes, we divide the diameter by the speed

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4 years ago
Which two days had a ratio of 2:5 computers sold?
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7 0
3 years ago
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A, b, c, d are the roots of 3x⁴-6x²+2=0. what is the value of a⁴+b⁴+c⁴+d⁴?
Pani-rosa [81]
Hello,

P(x)=x^4-6x²+2=(x-a)(x-b)(x-c)(x-d)
=x^4-(a+b+c+d)x^3+(ab+ac+ad+bc+bd+cd)x^2-(abc+abd+acd+bcd)x+abcd

==>
ab+ac+ad+bc+bd+cd=-6
abc+abd+acd+bcd=0
abcd=2
a+b+c+d=0 ==>(a+b+c+d)²=0=a²+b²+c²+d²+2(ab+ac+ac+bc+bd+cd)
==>a²+b²+c²+d²=0-2*(-6)=12




if a is a root P(a)=0==>a^4-6a²+2=0
if b is a root P(b)=0==>b^4-6b²+2=0
if c is a root P(a)=0==>c^4-6c²+2=0
if d is a root P(a)=0==>d^4-6d²+2=0

==>a^4+b^4+c^4+d^4-6(a²+b²+c²+d²)+4*2=0
==>a^4+b^4+c^4+d^4=-8+6*12=64


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