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borishaifa [10]
3 years ago
15

Geometry help please

Mathematics
2 answers:
Virty [35]3 years ago
4 0
Let x be the measure of angle BAC. Since this is an isosceles triangle, the measure of BCA is equal to BAC. 

x+x+90 = 180

2x+90-90 = 180-90

2x = 90

2x/2 = 90/2

x = 45

The two angles BAC and BCA are each 45 degrees. This is a 45-45-90 triangle

The answers to part A and B are the same: 45 degrees

-------------------------------------------

For parts C and D, the answers are also the same as well. This is because AB = BC in this isosceles triangle

AC = AB*sqrt(2)

10 = x*sqrt(2)

10/sqrt(2) = x*sqrt(2)/sqrt(2)

x = 10/sqrt(2)

x = 10*(1/sqrt(2))

x = 10*(sqrt(2)/2)

x = 5*sqrt(2)

AB is exactly 5*sqrt(2) units long

AB is approximately 7.0710678 units long

AB = BC so BC is also approximately 7.0710678 units long
xxTIMURxx [149]3 years ago
3 0
 C. length of AB i think so 
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Find the given term 11, -33,99 9th term
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Assuming the sequence goes on like this 11,-33,99,-297,891,...,
its general formula is a_n=-11\cdot(-1)^n\cdot3^{n-1}

So, the 9th term is
a_9=-11\cdot(-1)^9\cdot3^{9-1}=-11\cdot(-1)\cdot6561=72171
5 0
3 years ago
In a 10 x 10 grid that represents 800, one square represents
ludmilkaskok [199]
Each square represents 8

If it is 10×10 then there is 100 squares

800÷100=8
3 0
3 years ago
3/4x4/7 will be A less than B equal to C greater than 3/4​
Troyanec [42]

Answer:

less than, this is scaling dude

Step-by-step explanation:

7 0
3 years ago
A soccer team uses 5-gallon coolers to hold water during games and practices. Each cooler holds 640 fluid ounces. The team has s
polet [3.4K]
<h3>Answer:   640c - 6.25s - 8.75g</h3>

===============================================

Work Shown:

s = number of small cups

g = number of large cups

c = number of coolers

----------

1 cooler = 640 fluid ounces

c coolers = 640c fluid ounces

1 small cup = 6.25 fluid ounces

s small cups = 6.25s fluid ounces

1 large cup = 8.75 fluid ounces

g large cups = 8.75g fluid ounces

----------

T = total amount of water poured

T = (amount from small cups) + (amount from large cups)

T = 6.25s+8.75g

L = amount of water left

L = (original total amount of water) - (amount of water poured out)

L = 640c - T

L = 640c - (6.25s+8.75g)

L = 640c - 6.25s - 8.75g

8 0
3 years ago
What are all the real zeros of y=(x-20)^2 +5<br><br> Please show step by step I'm so lost!!
Lisa [10]

Answer:

No real zeros for the function.

Explanation:

  • zero of a function f, if f(r) = 0

<u>solve</u>:

\sf y=(x-20)^2 +5

<u>so when f(y) = 0</u>

\hookrightarrow \sf (x-20)^2 +5 = 0

\hookrightarrow \sf (x-20)^2  = -5

\hookrightarrow \sf (x-20)  = \sqrt{-5}

\hookrightarrow \sf x  = \pm \sqrt{-5} +20

\hookrightarrow \sf x  = \sqrt{-5} +20, \ \sf x  = -\sqrt{-5} +20

<u>check</u>:

\hookrightarrow f \sf (\sqrt{-5} +20) = Not \ applicable, f \sf (-\sqrt{-5} +20) = Not \ applicable

3 0
2 years ago
Read 2 more answers
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