Answer:
first discount for Q7 is $54.3915
the next discount is $48.95235
for Q8 is
Step-by-step explanation:
you are a very nice person for helping your mom. good luck for this!
ok let's work on question 7 first.
$63.99 is the cost of a skateboard.
15% of 63.99 = 10% + 5%
10% of 63.99 = 6.399 (move the decimal one place to the left)
5% of 63.99 = 1/2 of 6.399
1/2 x 6.399 = 3.1995
6.399 + 3.1995 = 9.5985
ok, so that's 15% of 63.99
now we need to take away 9.5985 from 63.99
63.99 - 9.5985 = 54.3915
the discount price of the skateboard is $54.3915
a further 10% is $5.43915
so take off that from the discount,
54.3915 - 5.43915 = 48.95235
the final price is $48.95235
QUESTION 8
shop A = 6.95 x 40
6.95 x 40 = $278
shop B = 20% of 325
20/100 * 325 = 65
325 - 65 = 260
therefore, shop B is cheaper.
hope this helped, good luck!
Answer:
x-intercept: (5, 0)
y-intercept: (0,4)
Step-by-step explanation:
The x- and y-intercepts of a function are the points that the line crosses the x- and y-axes.
We know that when the line is crossing the x-axis, the y-value has to be 0.
So let's use this, and the equation, to help us find the x-intercept.
Plug in 0 for y; this will help us find the x.
4x + 5(0) = 20
4x + 0 = 20
4x = 20
x = 5
Now we know that the line crosses the x-axis at x = 5. The intercept is (5, 0) because we already knew that y = 0.
We also know that when the line is crossing the y-axis, the x-value has to be 0.
So let's use this, and the equation, to help us find the y-intercept.
Plug in 0 for x; this will help us find the y.
4(0) + 5y = 20
0 + 5y = 20
5y = 20
y = 4
Now we know that the line crosses the y-axis at x = 4. The intercept is (0, 4) because we already knew that x = 0.
You can substitute these (5, 0) and (0, 4) back into the equation to make sure they fit, or graph the equation and make sure the points are correct.
Answer:
Step-by-step explanation:
When we have potential expression that include imaginary numbers, we have to consider some basic results, because these imaginary potential expression are cyclical.
We know that:
So, elevating both members to a third power, we have:
So, , which is the beginning, that's why we say that it's like a cycle.
So, from the problem, we have:
To solve this, we consider the operations from the beginning:
; and
; because
Therefore, the result would be
Answer to your question is 13.24
Any integer is a rational number: 7, -24. 0.4 and 0.75 are also rational.