<span>X= math problems
y= science problems
x +y =42
x= y+10
Substitute: (y+10) + y =42
Combine y: 2y +10=42
Solve for y: y= 16
There are 16 science questions and 26 math questions</span>
Answer:
B
Step-by-step explanation:
The closed circle at -
indicates that x can equal this value
The open circle at
indicates that x cannot equal this value.
All values of x between -
and
are valid, thus
-
≤ x <
→ B
Answer:

Step-by-step explanation:
Let's re-write the equations in order to get the variables as separated in independent terms as possible \:
First equation:

Second equation:

Third equation:

Now let's subtract term by term the reduced equation 3 from the reduced equation 1 in order to eliminate the term that contains "y":

Combine this last expression term by term with the reduced equation 2, and solve for "x" :

Now we use this value for "x" back in equation 1 to solve for "y":

And finally we solve for the third unknown "z":

Answer:
D! Both their decimal forms are equal to 5.65685424!
Answer:
you would take off %20 New total is 200
Step-by-step explanation:
20 percent of 250 is 50
250-50=200