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Reika [66]
3 years ago
8

Please help don't know how to do

Mathematics
1 answer:
Stolb23 [73]3 years ago
4 0
Area of a triangle is (basexheight)/2

That's what your Formula, then you have to plug in the numbers

so the algebraric expression is (5xn)/2

For then end if you look at the patteren for the height it goes by 2. So the last height would be 10.
Plug that into the equation, which would be (5x10)/2=25
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A bicycle shop is selling $500 bikes at 10% off. If the sales tax is 7%, how much will the bike cost?
erma4kov [3.2K]

Answer:

The bike will cost $481.50

because

10% off of 500 is 50

so 500 - 50 = 450

Now include the sales tax which is

450 * 0.07 = 31.5

Now add the two totals to get

$481.50

7 0
3 years ago
At what rate is a car traveling, if it goes 157.5 miles in 2.5 hours?
Finger [1]

divide total miles by time:

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4 0
3 years ago
If a 5 foot post casts an 8 foot shadow at the same time that a nearby tree casts a 48 foot shadow how tall is the tree
andriy [413]
The first thing we are going to assume for this case is that the tree and the post are located in the same place.
 From that place, both cast a shadow in the same direction.
 We then have two similar triangles.
 Therefore, we have the following relationship:
 \frac{x}{48} = \frac{5}{8}
 From here, we clear the value of x.
 We have then:
 x = \frac{5}{8} *48
 Rewriting:
 x=30
 Answer:
 
the tree is 30 feet tall
3 0
3 years ago
F(x) = 1/(5x-6)Find the derivative of this function
siniylev [52]

Given

f(x)=\frac{1}{5x-6}

To find the derivative of the give function,we apply below exponent rule first:

\frac{1}{a}=a^{-1}

So,

Next, we apply the chain rule:

So,

We substitute back u=(5x-6):

Simplify:

Therefore, the answer is:

=-\frac{5}{(5x-6)^2}

5 0
1 year ago
Which of the following is NOT a reason for forced migration?
swat32
Chance for better wages 
3 0
3 years ago
Read 2 more answers
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