Answer:
Step-by-step explanation:
All numbers in scientific notation or standard form are written
,
where m is a number between 1 and 10.
Answer:
B) 5(-3) either way its telling you to multiply 5 by -3
The answer is -3, i had a test with the same question
For question 6
Make x for first one subject of formulae
then it becomes
x=-2y
Substitution means replace your answer in the second part
since x=-2y
3(-2y) +4y = 4
-6y+4y=4
-2y=4
y= 4/-2
y=-2
Now to find x,replace the answer for y in one in the equation
so i replace y=-2 in the first part
x=-2y
x= -2(-2)
x=4
Therefore x=4 and y=-2
To check your answer replace x and y by the values you got and check if you get same answer.
Answer:
x=4
Step-by-step explanation:
To solve for x, we need to isolate it.
Start by adding 16 to each side to cancel out the -16:
-x=-4
-x is essentially -1 * x which can be written as -1x
-1x=-4
Divide both sides by -1 to isolate x
x=4
We can also plug this back into the equation to check:
-16-x=-20
-16-4=-20
-20=-20 --> correct!