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Brrunno [24]
3 years ago
13

There is only one positive integer which is exactly twice the sum of its digits. find this 2 digit number

Mathematics
1 answer:
ad-work [718]3 years ago
8 0
There is only one positive integer which is exactly twice the sum of its digits. find this 2 digit number

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An arch is in the shape of a parabola. It has a span of 100 feet and a maximum height of 25 ft.
faltersainse [42]

Answer:

y=-\frac{1}{100}(x-50)^2+25

the height of the arch 10 feet from the center is 24 feet

Step-by-step explanation:

An arch is in the shape of a parabola. It has a span of 100 feet, the vertex lies at the center 50 and the maximum height of 25 ft.

Vertex at (50,25)

vertex form of the equation is

y=a(x-h)^2+k, (h,k) is the center

y=a(x-50)^2+25

the parabola starts at (0,0) that is (x,y)

0=a(0-50)^2+25

subtract 25 from both sides

-25=a(-50)^2

-25=a(2500)

divide both sides by 2500

a=-\frac{1}{100}

y=-\frac{1}{100}(x-50)^2+25

the height of the arch 10 feet from the center.

center is at 50, 10 feet from the center so x=40 and x=60

y=-\frac{1}{100}(40-50)^2+25

y=24

the height of the arch 10 feet from the center is 24 feet

4 0
3 years ago
Megan is trying to remember her password for her computer. All she can remember is that it is 2 letters followed by 3 digits.
Vlada [557]
I think B. 1,676 
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6 0
3 years ago
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An angle measures 86.4° less than the measure of its supplementary angle. What is the measure of each angle?
AVprozaik [17]

Answer:

nsksnekwksnskswkwksks

4 0
3 years ago
The value of a car x years from now is given by v(x) = 2000(0.75)x. What is the annual compound interest rate of depreciation?
patriot [66]
Hello! So because the value in the parenthesis is less than one, this represents exponential decay. 0.75 is 75% in decimal form. Percents are parts of 100. let's multiply that number from 100. 100 - 75 is 25. There. The rate of depreciation is 25%.
4 0
3 years ago
Bethany has 4 baggies with 8 counters in each baggie. Alex has 7 counters
nikklg [1K]

Answer:

alex has 25 counters

Step-by-step explanation:

8x4=32

32-7=25

25 is your answer

6 0
2 years ago
Read 2 more answers
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