I need help please and thank you
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The pitch or slope of a roof is defined as the ration of rise and half of the span. In equation we can write:
Half-Span equals the run. So we can define the Pitch as:
Rise = 8 feet
Run = Half of span = 15 feet
Using the values in the above formula, we get:
Therefore, the pitch (or slope) of the roof in simplest form is 8/15
Pitch is normally defined as the vertical rise of a roof for ever 12 feet increase in its horizontal run. The above fraction shows the vertical rise is 8/15 for each 1 feet increase in the horizontal run. So if we simply multiply the the above fraction by 12, we will get the pitch in standard units.
So,
Pitch = 8/15 x 12 = 6.4
Therefore, the pitch of the roof will be 6.4
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$39 x 0.33 = $12.87
$39 - $12.87 = $26.13
Discount: $12.87
Sale price: $26.13
10% of $39 = $3.90
so...
30% of $39 = $11.70
This is because 30% is 10% multiplied by 3. So you just have to multiply 3.90 by 3.
Then you would work out 1%
1% of $39 = $0.39
so...
3% of $39 = $1.17
This follows the same principle as before.
Now you have to add them together to get the discount price.
11.70 + 1.17 = $12.87
To get the price after the discount, simply take the discount price away from the usual price:
39 - 12.87 = $26.13
Therefore the two answers to your questions are..
$12.87
and..
$26.13
Hope this helped :)
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2x - y = -1
Ok, we are going to solve this in 2 parts. First we have to solve for one of the variables in one of the equation in terms of the other variable. I like to take the easiest equation first and try to avoid fractions, so let's use the first equation and solve for x.
-x - y = 8 add y to each side
-x = 8 + y divide by -1
x = -8 - y
So now we have a value for x in terms of y that we can use to substitute into the other equation. In the other equation we are going to put -8 - y in place of the x.
2x - y = -1
2(-8 - y) - y = -1 multiply the 2 through the parentheses
-16 - 2y - y = -1 combine like terms
-16 - 3y = -1 add 16 to both sides
-3y = 15 divide each side by -3
y = -5
Now we have a value for y. We need to plug it into either of the original equations then solve for x. I usually choose the most simple equation.
-x - y = 8
-x - (-5) = 8 multiply -1 through the parentheses
-x + 5 = 8 subtract 5 from each side
-x = 3 divide each side by -1
x = -3
So our solution set is
(-3, -5)
That is the point on the grid where the 2 equations are equal, so that is the place where they intersect.
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44.4
2.22
lol it confused me first
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during the rest of the way (which is 0.7-x, as the whole way took her 42 minutes, so the rest is 0.7-x) she walked with 5 miles per hour - the distance was (0..7-x)*5 m/h
the total distance was 3 miles, so if we sum the two distances, we will get 3 miles:
x*4+ (0.7-x)*5=3
let's remove the bracket:
4x+0.7*5-5x=3
4x+3.5-5x=3
subtract 3.5 from both sides:
4x-5x=3-3.5
-x=-0.5
multiply both sides by (-1)
x=0.5:
so she walked for half an hour alone, that is for 30 minutes!
Answer:
D, 4x + 5(0.7 – x) = 3.
Step-by-step explanation:
yw egen2020
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There is .Tenths hundreths and so on behind the decimal they skip ones
~Riley
4 or less let it rest 5 or more raise the score that how I remember it