What two number mutiply to -240 but add up to 8
Answers
Then
xy = -240
x = - (240/y)
And
x + y = 8
Now let us put the value of x in the second equation. We get
x + y = 8
-( 240/y) + y = 8
y^2 - 240 = 8y
y^2 - 8y - 240 = 0
y^2 - 20y + 12y - 240 = 0
y(y - 20) + 12(y - 20) = 0
(y - 20) (y + 12) = 0
So we can see that the unknown number y can have two values and hence the unknown number will also have two values.
When
y - 20 = 0
y = 20
Then
xy = - 240
20x = - 240
x = -12
So we can see that when y is equal to 20 then x is equal to -12 and when y is equal to -12 then x is equal to 20. So the two numbers are 20 and -12.
Answer:
20 and 10
Step-by-step explanation:
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Answers
Answer:
work is shown and pictured
2. Simplify the radical
3. Simplify the radical
4. Simplify the radical
Answers
The simplification of the radical is c/3
What are radicals in math?
Radicals in math refer to expressions containing square roots or higher-order roots.
Represented by the radical symbol (√), they involve finding the root of a number. For example, √9 equals 3, as 3 * 3 equals 9.
Simplifying the surd;
√3c²)/√27
= √3 × √c²)/√9 × √3
= √3c/3√3
= c/3
Therefore the simplification of √3c²)/√27 is c/3.
learn more about radicals from
#SPJ3
Answers
Let's assign the variable 'n' to your given number.
If the given number is 'n', then the number one more than 'n' can be shown in the expression n+1
Answer= n+1
Answers
He does 1/8 of the job each hour.
Caitlyn can do the job in 6 hours.
She does 1/6 of the job each hour.
Working together, they do (1/8 + 1/6) of the job each hour.
Can you add those fractions ?
Change both to a denominator of 24.
1/8 = 3/24
1/6 = 4/24
(1/8 + 1/6) = (3/24 + 4/24) = 7/24
Working together, they do 7/24 of the job each hour.
Invert (7/24 job/hour) and you have (24/7 hour/job) .
24/7 = (3 and 3/7) hour/job.
Together, it takes them 3-3/7 hours.
(That's 3hours 25minutes 42.9 seconds.)
The question says "write an equation".
The equation could be H (number of hours) = 1 / (1/8 + 1/6)
Answers
3x – 7 = 2
A) (3, 7)
B) (7, -7)
C) (-3, 7)
D) (3/4, 2/5
Answers
Hi
4x-y=5
3x-7=2
We need to solve 3x-7=2 for x
Let's start by adding 7 to both sides
3x-7+7=2+7
3x=9
Now just divide both sides by 3 so we can find the value for x
3x/3=9/3
x=3
Now substitute 3 for x in 4x-y=5
4x-y=5
(4)(3)-y=5
-y+12=5
Now add -12
-y=12-12=5-12
-y=-7
Divide both sides by -1 so we can eliminate the negative sign
-y/-1=-7/-1
y=3
The answer is A
(3,7)
I hope that's help:0