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2 years ago

Can someone help please

Mathematics

1 answer:

larisa [96]2 years ago

5 0

Answer:I got the pic over here

Step-by-step explanation:

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A toy store had 3 boxes that weighed a total of 28 kilograms.how much did each box weigh

QveST [7]

Answer:

Step-by-step explanation:

28/3

9.333333333333333

4 0

2 years ago

Read 2 more answers

Malachy was thinking of a number. Malachy adds 9 then divides by 3 to get an answer of 48. Form an equation with

stepladder [879]

Step-by-step explanation:

Let,

Number = x

$(x+9) \div 3=48$

$x+9=48\times 3$

$x+9=144$

$x=144-9$

$x=135$

Therefore,

The number = 135

6 0

2 years ago

The normal mean temperature in borrow Alaska is -2F in November the normal mean temperature in October is 19F warmer than in Nov

Tamiku [17]

Answer:

17F

Step-by-step explanation:

(-2F) +(19F) = 17F

The signed numbers add in the usual way. (If you really can't do this in your head, a calculator can help.)

3 0

2 years ago

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

2 years ago

HELPPPP<br><br> If y=4, 3y+6=7(2y-3)

Step2247 [10]

Answer:

i think your question is missing something??

Step-by-step explanation:

3(4) + 6 = 7 (2(4)-3)

12 + 6 = 7 (8-3)

18 = 7 (5)

18 = 35?

8 0

2 years ago