What times what equals 15 but adds up to positive 2
Answers
3 times 5 equals 15.
The numbers that satisfy both conditions are 3 and 5.
To find two numbers that multiply to 15 and add up to positive 2,
we can use algebraic reasoning.
Let the two numbers be x and y.
We know that:
x * y = 15 (they multiply to 15).
x + 2 = y (they add up to positive 2).
Now we can use these two equations to solve for x and y.
From equation (2), we can express y in terms of x:
y = 2 + x
Now, substitute this expression for y into equation (1):
To factor the quadratic equation, we need to find two numbers whose product is -15 and whose sum is 2.
The two numbers are 5 and -3.
So, we can rewrite the equation as:
(x + 5)(x - 3) = 0
Set each factor to zero and solve for 'x'.
x + 5 = 0 or x - 3 = 0
For the first factor:
x + 5 = 0
x = -5
For the second factor:
x - 3 = 0
x = 3
we can see that the two numbers that multiply to 15 and add up to 2 are 3 and 5.
3 * 5 = 15
3 + 5 = 8
So, the numbers that satisfy both conditions are 3 and 5.
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Answers
°° Awesome question!
I'll show you how to solve this kind of question:
First, you can multiply 9 times any number to see if it's smaller than 67. If it is, it is OK to keep multiplying 9 by more numbers. Let's try this!
9 × 1 obviously equals 9, so we can keep going up.
9 × 2 = 18. Not quite there yet!
Sometimes it is OK for you to skip some numbers, Watch:
9 × 5 = 45. We can keep going. At this point you don't need to go backwards and do9 × 3 or 9 × 4, because the products will only get farther away from 67.
9 × 6 = 54. We're getting closer!
Let's try to skip one number:
9 × 8 = 72 - HOLD UP! Oh no! We went over a little too much!
Let's try a number in between 6 and 8 - That would be 7, right?
9 × 7 = 63 - We were right on point! Obviously you can't multiply 9 by 8 again because you would get a bigger number - the 72.
__________________________________________________________
That was just one way to go about it, but there's another way, too!
You can divide 9 by 67 and see what you get. You may have a remainder, but you can just throw that out the window when we're all done:
9 ÷ 67 = 7.4444444444444444 The 4 just repeats on and on again, and we don't want that. So just throw those 4's out the window so you're left with 7.
Based on all this work, 9 goes into 67 7 times.
↑ ↑ ↑ Hope this helps! :D
Although, 67 divided by 7.4 repeating would be a perfect 9!
b)describe what the slope and y intercept represent.
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(A)The slope is 7.7 (B) and shows that there is a 7.7 charge per week the person attends.
(A)The y intercept is 59 (B) and is the initial fee that the gym charges.
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Answer:
The answer is 70
Step-by-step explanation:
Just add 40 and 30 and you'll get your answer
Final answer:
To find the value of y, set up an equation where y + (-30) = 40. Solve for y by isolating it on one side of the equation.
Explanation:
To solve this problem, we can set up an equation using the information given. Let's represent the unknown number, which is the sum of y and -30, as x. We can write the equation x = 40. To find the value of x, we'll need to isolate it by performing the opposite operation of adding -30, which is adding 30 to both sides of the equation. This gives us x + 30 = 70. Finally, subtracting 30 from both sides gives us x = 70.
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