MATHEMATICS HIGH SCHOOL

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Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

that is what I know and if I'm wrong please tell me right away I'll try it out again thank you

Answer 2

Answer:

Answer:

5 meters

Step-by-step explanation:

The room is rectangular, so the two walls and the diagonal (distance between opposite corners) form a right triangle.

We can use $a^2 + b^2 = c^2$ to compute the other wall's length:

$13^2 = 12^2 + x^2\n169 = 144 + x^2\n25 = x^2\nx = \pm 5$

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The daily high temperatures, in degrees Celsius, for two weeks were recorded. The first week had a mean high temperature of 8 degrees Celsius and a mean absolute deviation (MAD) of 1 degree Celsius. The second week had a mean high temperature of 4.86 degrees Celsius and a mean absolute deviation (MAD) of 1.91 degrees Celsius. Which week had greater variability in high temperature? Explain your reasoning.
PLEASE HELP ASAP ILL MARK BRAINLEST

Please help will mark brainliest

Answers

Answer:

20 ft² - 4ft² = 16 ft²

Step-by-step explanation:

First we solve for the whole rectangle:

Formula: A = ab

side length a = 5 in

side length b = 4 in

diagonal p = q = 6.4031242374328 in

perimeter P = 18 in

area A = 20 in²

Second we deduct the Area of the cutout of the Square

side length a = 2 ft

Area = a² = 4 ft²

Sin78 ×cos42+cos78×sin42 evaluate without the use of a calculator

Answers

sin a * cos b + cos a * sin b=sin (a+b)

sin 78 * cos 42 + cos 78* sin 42=sin (78+42)=sin 120=sin(180-120)=
sin 60=√3 / 2

Answer: sin 78 * cos 42 + cos 78* sin 42=√3 / 2

3x+y=8 I really don't understand this and I have tried to get the answer but always end up wrong.3x-y=4

Answers

Answer:

The solution of the system of the equation is (2, 2)

Step-by-step explanation:

Let us solve the system of equations

∵ 3x + y = 8 ⇒ (1)

∵ 3x - y = 4 ⇒ (2)

→ Add equations (1) and (2) to eliminate y

∴ (3x + 3x) + (y + -y) = (8 + 4)

∴ 6x + 0 = 12

∴ 6x = 12

→ Divide both sides by 6 to find x

∵ $(6x)/(6)=(12)/(6)$

∴ x = 2

→ Substitute the value of x in equation (1) to find y

∵ 3(2) + y = 8

∴ 6 + y = 8

→ Subtract 6 from both sides

∵ 6 - 6 + y = 8 - 6

∴ y = 2

∴ The solution of the system of the equation is (2, 2)

Sam has 12 black and white photos and 18 color photos.he wants to put the photos in equal rows so each row has either black and white photos only or color photos only. in how many rows can Sam arrange the photos

Answers

The question is asking us to determine the number of rows in which Sam can arrange his 12 black and white and 18 color photos. Sam wants to put them in the equal rows so that each row has either black and white photos only or color photos only. We have to find the GCF ( the Greatest Common Factor ) of 18 and 12. GCF ( 18, 12 ) = 6. So there should be 6 photos in each row if they have to be equal ( the equal number of photos in every row ). 18 = 6 * 3 and 12 = 6 * 2. Therefore the number of the rows is : 3 + 2 = 5. Answer: Sam can arrange his photos in 5 rows.

Answer:

Step-by-step explanation:

First you have to find the GCF (greatest common factor) and the GCF is 6

Then you have to multiply 3×6 = 18, 2×6 = 12

Next add 3 + 2 = 5 because I added the first digits of the multiplying thinge

Write it like this (if you want):

Sam can arrange his photos in 5 rows

Which is the correct label of the parallel lines

Answers

The symbol to show that there are parallel lines is normally just a set of vertical lines. Although if these are being drawn on a page and need to be labelled as part of a shape or diagram, sometimes arrows will be used to show they are parallel - either one arrow in the middle of the line, or two arrows to show they are parallel but in different directions.

Answer:

a ║ b

Step-by-step explanation:

to show parallel lines, you use the sign ║ between the lowercase letters corresponding to each line.

2/3 as a whole number

Answers

285 x 2 to get 570, then divide by 3, which equals 190

2/3 isn't a whole number because it's equal to:

0.666666666666....

Whole numbers are numbers such as:

0, 1, 2, 3 etc.

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3r = 10 + 5s, when r = 10

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Write 2.6 as a mixed fraction

What is 5.63×10−6in decimal form?a. 0.00000563 b. 0.000000563 c.5,630,000d. 56,300,000