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likoan [24]
3 years ago
15

I need help! PLEASE HELPP PLEASE HELP!!!

Mathematics
1 answer:
DanielleElmas [232]3 years ago
4 0

Answer:

Part 1: 31x+25=180

part 2: x=5

Step-by-step explanation:

there are 180° on a straight line, which is the base/ bottom line of the traingle (indicated by the arrow on the end).

so, 180-151= 29

29° is the third angle on the traingle.

now, there are 180° in a triangle, therefore to find an equation for x:

29+20x-3+11x-1= 180 (adding up all the angles and making it equal to 180°)

now simplify this equation to get:

31x+25=180 (PART 1)

to find x simply solve the equation:

31x=180-25

31x= 155

x= 155/31

x=5 (PART 2)

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A kayaker can paddle 12 mi in 2 h moving with the river current. Paddling at the same pace, the trip back against takes 4 h. Ass
Firdavs [7]
Downstream DATA:
distance = 12 miles 
time = 2 hours 
rate = 12/2 = 6 mph
----------------
Upstream DATA:
distance = 12 miles 
time = 4 hrs 
rate = 12/4 = 3 mph
----
Equations:
Downstream: b + c = 6
Upstream::: b - c = 3
------
Add to get:
2b = 9
b = 4.5 mph (speed of the boat in still water.)
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Solve for "c":
b + c = 6
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The answer is 1.5 mph
7 0
3 years ago
Two angles that add up to 90° are called SUPPLEMENTARY angles. TRUE OR FALSE
svet-max [94.6K]

Answer:

This is FALSE. Two supplementary angles add up to 180 degrees.

Step-by-step explanation:

Hope this helped! :-)

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3 years ago
Which expression is equivalent to [(3xy^-5)^3 / (x^-2y^2)^-4]^-2
True [87]
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Explanation:
We can begin simplifying inside the innermost parentheses using the properties of exponents. The power of a power property says when you raise a power to a power, you multiply the exponents. This gives us

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Negative exponents tell us to "flip" sides of the fraction, so within the parentheses we have
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Using the quotient property, we subtract exponents when dividing powers, which gives us
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Evaluating 3</span>³<span>, we have
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Using the power of a power property again, we have
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3 years ago
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Answer:

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Step-by-step explanation:

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