9514 1404 393
Answer:
Step-by-step explanation:
When x represents the number, "the sum of 3 and a number" is (x+3). Twice that sum is 2(x+3). "Is 30" means this expression is equal to 30:
2(x +3) = 30 . . . . an equation for the given conditions
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We can solve this equation by dividing by 2:
x + 3 = 15
x = 12 . . . . . . subtract 3
The number is 12.
279/34 = 8.20588235294
But if you would like to round it up it would be 8.2 or 8.21 depending on what you'd like to round it up to.
Let me know if this is what you mean. If not, I will fix it! :)
Answer:
5 min
Step-by-step explanation:
I think its 17- 2ft (which was already dug)
then 15÷3 which is 5
Step-by-step explanation:
let the 2 numbers be x and y.
x - 8 = y --(1)
5x = 2y - 8 --(2)
sub (1) into (2):
5x = 2(x - 8) - 8
5x = 2x - 24
3x = -24
x = -8
sub x = -8 into (1):
y = -8 - 8 = -16
first number is -8 and second number is -16.
Topic: algebraic equations + simultaneous equation
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Answer:
9 inches
Step-by-step explanation:
Here, we want to know the greatest length of the third side
We apply the triangle inequality theorem here
To get the third side, then the sum of the lengths of the two must be greater than the measure of the third side
let us call the third side x
Then;
5 + 5 > x
10 > x
The highest whole number before 10 is 9: so it is the greatest possible whole number the base of the isosceles triangle can have