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Andrews [41]
3 years ago
12

PLEASE help with these math questions

Mathematics
2 answers:
valentina_108 [34]3 years ago
3 0
Pythagorean theorem: a² + b² = c²
a = long leg
b = short leg
c = hypotenuse

graph can form a right triangle:
JK: a = 7 - 3 = 4 ; b = 5 - 3 = 2 
⇒ 4² + 2² = c² ⇒ 16 + 4 = 20 ; c = √20 = 4.47 or 4.5 units

VW: a = 6 - (-2) = 6 + 2 = 8 ; b = -3 - (+4) = 7
⇒ 8² + 7² = c² ⇒ 64 + 49 = 113 ; c = √113 = 10.63 units

EG: a = 7 - (-2) = 7 + 2 = 9 ; b = 9 - 1 = 8
⇒ 9² + 8² = c² ⇒ 81 + 64 =  145 ; c = √145 = 12.04 units

EG: a = -1 - 6 = 7 ; b = 2 - (-2) = 2 + 2 = 4
⇒ 7² + 4² = c² ⇒ 49 + 16 = 65 ; c = √65 = 8.06 units

Trapezoid: Rectangle and right triangle.

Rectangle = 1 side of the width is the long leg of the right triangle.

a = 8 - 2 = 6 ; b = 12 - 9 = 3
6² + 3² = c² ; 36 + 9 = 45 ; c = √45 = 6.71 units

upper base:CD:  9 - 2 = 7
lower base: BA: 12 - 2 = 10
side: DA: 8 - 2 = 6
side: CB: 6.71

Perimeter = 7 + 10 + 6 + 6.71 = 29.71 units

lapo4ka [179]3 years ago
3 0
The first one is just some simple application of Pythagora's theorem.

Since you go up -2 (no negative lengths), and across 4. You can apply the theorem to get:
2^2 + 4^2 = x^2
x = 4.4721
x = 4.5

I won't answer all of these for you, if you need more help just say please.
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Misha Larkins [42]

Answer:

c

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4 0
2 years ago
The circumference of a circle is 3.14 inches.<br> What is the area of the circle?
SVETLANKA909090 [29]

Answer:

A = .785 inches ^2

Step-by-step explanation:

C = pi *d

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3.14 = 2*pi*r

3.14 = 2*3.14 *r

Divide by 3.14 on each side

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Divide by 2

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6 0
3 years ago
Use long division to find the quotient below. (5x5 -5x3 - 10x2 - 80x) = (x+2)
kykrilka [37]

Answer: c

Step-by-step explanation:

8 0
3 years ago
Does the inequality sing mean equals in an equasion
shtirl [24]
Here are the 4 inequality signs.

a < b     ---> a is less than b
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a > b     ---> a is greater than b
a \ge b    ---> a is greater than or equal to b

For the second and fourth lines above, the two sides may or may not be equal.
For the first and third lines above, the two sides cannot be equal.

6 0
2 years ago
PLEASE HELP! Answer quickly for points!! There are 5 times as many tomato plants as there are cucumber plants. The number of pep
miskamm [114]
Let x= cucumber plants
5x= tomato plants
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peppers = 19 
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6x+7=19
subtract 7 from both sides
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x=2
replace the x with 2

2= cucumber plants
10= tomato plants

hope this helps
3 0
3 years ago
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