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2 years ago

In Kayla's grade, 3/4 of the students have a sister. Of the students who have a sister, 2/5

Mathematics

1 answer:

ioda2 years ago

4 0

Answer:brother? Simplify your answer and write it as a fraction or as a whole or mixed number.

Step-by-step explanation:

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Domain of (x-5)(x+5)

soldier1979 [14.2K]

X2 -25 that’s the answer but it’s x squared 2 if that makes sense

4 0

2 years ago

Which dot plot is symmetric? Number of Correct Answers on the Quiz A dot plot going from 0 to 5. 0 has 3 dots, 1 has 6 dots, 2 h

il63 [147K]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

$sin^2x + cos^2x = 1$

So;

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

becomes

$(sin x - cos x)^2 = 1 - 2sinx cos x$

Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

3 0

3 years ago

Paul has two label-printing machines. Each machine can print 30 labels per minute. On day 1, only the first machine was used, an

Paraphin [41]

90+30x+30y. This is because the first day, 90 labels were printed, then you will use 30 times x to find how many minutes. This is the same for 30 times y. Youre trying to figure out how many minutes each machine printed for.

4 0

3 years ago

1/3(m-1)=-5<br> Please help

dezoksy [38]

Answer:

m=-14 I hope this helps u

Step-by-step explanation:

6 0

3 years ago