Answer:
I am pretty sure the answer is A
Total heads = 10
Total legs = 26
Cat = 4 legs
Birds = 2 legs
------------------------------------
Assumed all birds :
------------------------------------
Total legs = 10 x 2 = 20
------------------------------------
Difference in legs :
------------------------------------
26 - 20 = 6
------------------------------------
Difference in legs between the two animals:
------------------------------------
4 - 2 = 2
------------------------------------
Find number of cats :
------------------------------------
6 ÷ 2 = 3
------------------------------------
Find number of birds :
------------------------------------
10 - 3 = 7
------------------------------------------------------------------------
Answer: There are 3 cats and 7 birds.
------------------------------------------------------------------------
Let "a" and "b" be the two numbers
So a*b=-8 and a+b=-7
Therefore S=-7 and P=-8
Using (x^2)-S+P=0 => (x^2)-(-7)+(-8)=0 => (x^2)+7-8=0
By factorizing we get (x+8)(x-1)=0
So a can be either -8 or 1 and b can be 1 or -8
Meaning that the two numbers are -8 and 1.
Step 1: 13+5x=30
step 2: subtract 13 from both sides; then youd get 5x=17
step 3: divide by 5
step 4: x=3.4
i hope this is what you were looking for
9514 1404 393
Answer:
- inverse operation are used
- the variable needs to be isolated
Step-by-step explanation:
A solution is always of the form ...
variable = something
In order to get this form, the variable needs to be isolated (put by itself on one side of the equal sign).
In general, isolating the variable involves using inverse operations to "undo" whatever is done to the variable. These are generally applied in the reverse order of the operations that are done to the variable. The list of operations done and their order can be identified using the Order of Operations to consider how an equation would be evaluated for some value of the variable.