Answer:
$28.5
Step-by-step explanation:
25% of 38 is 9.5. You subtract 9.5 from 38 to get 28.5.
Answer:
C.) x= -4
Step-by-step explanation:
just took the test on edg. 2020
For the reciprocal, you swap numerator and denominator.
a. The reciprocal of
is
To rationalize the irrational denominator, multiply numerator and denominator by the radical, then simplify.
b.
Answer:
-10, 3
Step-by-step explanation:
-10, 3 work since
-10 + 3 = -7
Step-by-step explanation:
7x² + 9x² - x²
when you wrote the expression you used the "multiplication ×" and not "x".
anyway, when you have terms of the same variable of the same exponent, then the combination variable and exponent become an item. and the same items can simply be added in an expression.
this is similar to
7 apples + 9 apples - 1 apple
what would you do there ?
see ?
and the same we are doing now for the given expression : we are adding the terms up :
7x² + 9x² - x² = (7 + 9 - 1)x² = 15x²
and in the middle I gave you even the reason why we can do that.
please, let me know, if this is still unclear.
