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Nostrana [21]
3 years ago
6

A proof in which you assume the opposite of what you want to prove

Mathematics
1 answer:
KonstantinChe [14]3 years ago
6 0
Proof of Contradiction. 
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The length of a picture frame is 7 inches more than the width. For what values of x is the perimeter of the picture frame greate
makkiz [27]
P=2(L+W)
l=x+7
w=x
P=2(x+7+x)
P=2(2x+7)
P=4x+14

hast to be greater than 154

P>154
4x+14>154
minus 14 both sides
4x>140
divide 4
x>35


4 0
3 years ago
−838−1016= ? i dont understand
Maslowich

Answer:

The answer is 236

6 0
3 years ago
Read 2 more answers
HELPPPPPPPPPPP
liubo4ka [24]
<span>(A) Find the approximate length of the plank. Round to the nearest tenth of a foot.
Given that the distance of the ground is 3ft.
In order to get the length of the plank,
we can use the this one.

cos 49 = ground / plank
cos 49 = 3 / plank
plank = cos 49 / 3
plank = 0.10 ft

</span><span>(b) Find the height above the ground where the plank touches the wall. Round to the nearest tenth of a foot.
</span><span>
The remaining angle is equal to
angle = 180 - (90+49)
angle = 41

Finding the height.
tan 41 = height / ground
tan 41 = height / 3
height = tan 41 / 3
height = 0.05 ft.

(A) 0.10 feet
(B) 0.05 feet</span>
3 0
3 years ago
What is the area of the parallelogram?
Maksim231197 [3]

Answer:

Step 1: area is base × height

Step 2: 36cm2

Step-by-step explanation:

Base × height is 9 and 4 and 9×4 = 36cm2

Hope this helps :)

8 0
2 years ago
The average cost of a yearbook, years since 1985, is found in the function f(x)= 0.65x+24.75. What is the average cost of a year
pishuonlain [190]
There has been 28 years since 1985 to 2013, this becomes your x value. Plug x into the equation:

f(x) = (.65*28)+24.75
f(x) = 18.2+24.75
f(x) = 42.95
3 0
3 years ago
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