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-BARSIC- [3]
3 years ago
13

What is the value of x? show work

Mathematics
1 answer:
Alona [7]3 years ago
7 0
2x+38=180
2x=142 (or x+x=142 from which 2x=142)
x=71 

The unknown angles are each 71

You know this answer is logical as, since two sides are 21 it hints that we are looking at an equilateral triangle, which means two of its angles will be the same
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Andrew used a pedometer to measure the
pychu [463]

Answer:

  13.25 mi

Step-by-step explanation:

The largest number on the list is 13.25. The greatest distance was 13.25 miles.

_____

In order from smallest to largest, the distances are ...

  4.9, 5.95, 8.9, 9.8, 13.25

8 0
3 years ago
Converting Explicit formula to Recursive formula.
Kruka [31]
The formula
a(n) = 2 - 5(n-1)
is in the form
a(n) = a1 + d(n-1)

where
a1 = first term = 2
d = -5 = common difference

The first term is carried over to the recursive formula. We start with a1 = 2. The next term after that is found by subtracting 5 from the previous term. So
second term = (first term) - 5
third term = (second term) - 5
and so on

The recursive step would be 
a(n) = a(n-1)-5

So that's why the answer is choice C
8 0
3 years ago
X + 5y = 8<br> -x + 2y = -1<br> How is this solved?
Oksi-84 [34.3K]
Add both the equations together to eliminate x

x+5y=8
-x+2y=-1

7y=7
y=1

Now fill in y into the original equation

x+5(1)=8
x+5=8
x=3

Now you can check by filling x and y into the second equation.

-(3)+2(1)=-1
-3+2=-1
-1=-1

So your answer will be (3, 1)

Brainliest my answer if it helps you out?
8 0
2 years ago
Convert 7 centimeters to millimeters.
11111nata11111 [884]
7*10=70 millimeters

1 cm=10 mm
7 0
3 years ago
Can someone help me with this substitution method for algebra Y=4*-3x 5x-y=22
alexira [117]
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7 0
3 years ago
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