Answer:
-19 + 8 - 18 = -29
he is 29 feet below sea level when he takes the photo
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
Givens
Let child one = x
Let child two = y
Let child three = z
Equations
x^2 + y^2 + z^2 = 100
xy + xz + yz = 150
Solution
There's a trick here. The square of their weights added together is equal (with some modification) to the given conditions. Start by squaring (x+y+z).
(x + y + z)^2 = x^2 + y^2 + z^2 + 2xy + 2xz + 2yz
Take out 2 as a common factor from the last three terms.
(x + y + z)^2 = (x^2 + y^2 + z^2+ 2(xy + xz + yz) )
Substitute the given conditions into the equation. (x^2 + y^2 + z^2) = 100 and 2*(xy + xz + yz) = 2 * 150
(x + y + z)^2 = 100 + 2*150
(x + y + z)^2 = 100 + 300
(x + y + z)^2 = 400
Take the square root of both sides.
sqrt(x+y+z)^2 = sqrt(400)
x + y + z = 20
Note
This answer tells you nothing about the values of x y and z. On the other hand it does not ask for the values of x y and z.
Answer:
The total amount of cleaning product the cleaning service orders is 1,764 ounces
Step-by-step explanation:
Here, we are interested in knowing the total amount of cleaning product ordered by the cleaning service.
To get this, we simply multiply the number of bottles by the weight and add up both;
Mathematically, that would be;
7(124) + 14(64) = 868 + 896 = 1,764 ounces
Answer:
Whenever 
.
Step-by-step explanation:
We can play around with some numbers and develop some rules for this equation.
Note that the number 5 and -5 are used here, so let's try using 5 as a.
So 5 works. Let's try a random number like 3.
Okay, with this info we know that we might be able to develop one rule that 
. Just to test, let's try 0, -3, and -5.
Zero works.
-3 works.
-5 works. Now, this might stop here making the equation 
, so let's test a number outside of -5 - say -20.
Yes! This works, so a works for this equation as long as 
.
Hope this helped!
Answer:
2.5
Step-by-step explanation:
a = 1
b = 5
ab
= 1 x 5
= 5
0.5b
= 0.5 x 5
= 2.5
ab - 0.5b
= 5 - 2.5
= 2.5
