3 years ago

True or false, If false what would be the correct term to use?

Mathematics

1 answer:

Luda [366]3 years ago

4 0

Answer:

In a proportion, the cross products of the extremes equal the cross product of the means.

Step-by-step explanation:

True

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Sin^22x - 2cos2x + 2=0

zhuklara [117]

Answer:

x=πn, n∈Z

Step-by-step explanation:

if sin²2x=1-cos²2x, then

1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

$\left[\begin{array}{cc}cos2x+3=0\\cos2x-1=0\\\end{array} \ \ \left[\begin{array}{cc}x \ 'does-not-exist'\\cos2x=1\\\end{array} \ \ 2x=2\pi n, n=Z \ x=\pi n, n=Z$

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3 years ago

In the diagram below of triangle GHIGHI, JJ is the midpoint of \overline{GI} GI and KK is the midpoint of \overline{HI} HI . If

telo118 [61]

Answer:

25.5

Step-by-step explanation:

2( -21+9x)=2x+18

-42+18x=2x+18

+42 +42

18x=2x+60

-2x -2x

16x=60

60/16=3.75

x=3.75

GH=2x+18

2(3.75)+18

7.5+18=25.5

GH=25.5

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3 years ago

If 4 melons sell for $0.52, how much would 7 melons cost?

mamaluj [8]

Answer:

0.91

Step-by-step explanation:

0.52/4=0.13

0.13*7=0.91

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3 years ago

HELP!!!<br> Describe the shape of the data distribution

Natalija [7]

The data distribution is positively skewed

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3 years ago

Lines p and q are perpendicular. Line p is described by the equation 2x-5y=8. Line q passes through the point (-6,2) Which equat

SIZIF [17.4K]

Answer:

Step-by-step explanation:

2x-5y=8. y = 2/5x-8/5

Line q: (-6,2). Slope -5/2

y-2 = -5/2(x- - 6). y-2 = -5/2(x+6)

y-2 = - 5/2x - 6

y = -5/2x -6 +2

y = - 5/2x - 4

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3 years ago