A
let the 2 numbers be x and y , then
x + y = - 5 ( sum of numbers )
x - y = - 17 ( difference of 2 numbers )
add the 2 equations term by term to eliminate y
2x = - 22 ( divide both sides by 2 )
x = - 11
substitute x = - 11 into x + y = -5 and solve for y
- 11 + y = - 5 ( add 11 to both sides )
y = - 5 + 11 = 6
The 2 numbers are - 11 and 6 → A
Answer : 
Given: axis of symmetry of x = –2
To find axis of symmetry we use formula 
We check which equation has axis of symmetry x= -2
(1) 
a=1 , b=4 so axis of symmetry 
(2) 
a=1 , b=-4 so axis of symmetry 
(3) 
a=1 , b=6 so axis of symmetry 
(4) 
a=-2 , b=-8 so axis of symmetry 
(5) 
a=-2 , b=8 so axis of symmetry 
So and 
has axis of symmetry x=-2
Answer:
Step-by-step explanation:
The given statement is;: 'I think of a number, multiply it by 3, add 4 & square the result.'
At first, let's take the unknown number as 'x' . (asked in the question).
So, the number we think about = x
Now, we need to multiply it by 3. So,
In the next part, we need to add 4 to it so,
Now, by squaring the result, we'll get the expression as,
<u>____________</u>
Hope it helps!
The cooper's weight as an adult dog will be 90 pounds.
<h3>
What is percentage?</h3>
Percentage, which is a relative figure used to denote hundredths of any quantity. One percent (symbolized as 1%) is equal to 100 parts; hence, 100 percent denotes the complete amount, and 200 percent designates double the amount specified.
A typical method for calculating a percentage is the formula shown below:
- Determine the total amount of what you want to find a percentage.
- Divide the number to determine the percentage.
- Multiply the value by 100.
Calculation for the weight of Cooper as an adult;
Cooper's present weight is 20 pounds.
He will weigh about 350% as much as his current weight.
Calculate 350% of 20 pounds.
= (350×20)/100
= 70
The increment of the weight of Cooper will be 70 pounds.
Thus, the total weight is 20 + 70 = 90.
Therefore, the weight of Cooper after 350% as an adult would be 90 pounds.
To know more about the percent change, here
brainly.com/question/809966
#SPJ4
Let the number of boys be x
Let the number of girls be y
x＝y＋5
3y＝2x＋12
3y＝2(y＋5)＋12
y＝22
3×22＝2x＋12
x＝27
(x, y)＝(27, 22)
There are 27 boys and 22 girls.
Hope my answer helped u :)
