Answer:
$570
Step-by-step explanation:
Given that:
For each hour of tutoring, Lena earns 30 dollars.
E is her earning and
H is the number of hours for which she tutors.
To find:
Equation relating E to H.
Solution:
Let Lena tutors for 1 hour, then the earning = 30 dollars
Let Lena tutors for 2 hours, then the earning = 30+30 OR 2
30 = 60 dollars
Let Lena tutors for 3 hours, then the earning = 30+30 +30 OR 330 = 90 dollars
If Lena tutors for H number of hours, then the earning, E = 30 + 30 + .... + 30 (H times) i.e.
So, the equation that relates E to H is given as:
Now, it is given that she tutors for 19 hours.
Let us put H = 19 hours in the above equation:
Therefore, the earning for 19 hours of tutoring is <em>570 Dollars.</em>
Answer:
-155
Step-by-step explanation:
Wne solved they have different answers
35 - 15 = 20
and
43 - 26 = 17
Answer:
x = -2i and x = 2i
x = 3 and x = - 3
Step-by-step explanation:
x^4 - 5x^2 - 36 = 0
let u = x^2 and substitute
we have:
u^2 - 5u - 36 = 0
(u - 9)(u + 4) = 0
u = 9 and u = - 4
substitute back for u
x^2 = 9
x = 3 and x = - 3
x^2 = -4 -- i am going to assume you've learned imaginary numbers; otherwise, you cannot take the square root of a negative number.
x = -2i and x = 2i
Answer:
<em><u>A will be your correct answer.</u></em>
<em><u /></em>
Step-by-step explanation:
When flipping shapes over the x axis, <em>(The horizontal line)</em> the <u>x coordinates stay the same</u>, but the shape's <u>y coordinates are opposite to the original shape</u>. <em>(If the shape's y coordinates are positive, then after flipping it on the x axis, the shape's y coordinate become negative.)</em>
The only flipped shape that fits this description is<u> A. or the first answer</u>.
