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3 years ago

I need help please!!

Mathematics

1 answer:

ad-work [718]3 years ago

5 0

2x + 3x + 3x + 12 = 180° [Sum of all angles of a triangle is 180°]

=> 7 x = 180° - 12°

=> 7 x = 168°

=> x = $\frac{168}{7}$ °

=> x = 24°

$\\$

? = 2x + 3x

=> 2×24° + 3×24°

=> 48° + 72°

$\\\\\\$

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️

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Subtract (5x^2+3)-(2x^2+4x-12)

Lapatulllka [165]

Answer:

Final answer is $3x^2-4x+15$

Step-by-step explanation:

Given expression is $(5x^2+3)-(2x^2+4x-12)$ .

Now we need to subtract them.

We are allowed to subtract like terms only that has same variable with same exponent.

$(5x^2+3)-(2x^2+4x-12)$

$=5x^2+3-2x^2-4x+12$

$=5x^2-2x^2-4x+3+12$

$=(5-2)x^2-4x+(3+12)$

$=(3)x^2-4x+(15)$

$=3x^2-4x+15$

Hence final answer is $3x^2-4x+15$

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3 years ago

Read 2 more answers

Karen needs to make a total of 60 deliveries this week. So far she has completed 33 of them What percentage of her total deliver

Luden [163]

Answer:

55%

Step-by-step explanation:

(33/60) * 100

leave a comment if u need further explanation

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2 years ago

Relate-to-a-Simpler-Problem

Alex73 [517]

Answer:

1. 128 pages.

2. (y - x) + 1

3. 6 pages.

4. Helps to formulate the expression for the number of pages read.

Step-by-step explanation:

1. George will read pages 385 through 512 in his karate history book. And we are asked to find the number of pages that he will read.

The required number of pages that George read will be = (512 - 385) + 1 = 128 pages.

2. If he read from page number x through page number y then the general rule of finding the number pages that he read will be = (y - x) + 1

3. If x = 500 and y = 505, then the number of pages read is = (505 - 500) + 1 = 6 pages.

Again, if x = 5 and y = 29, then again the number of pages read is = (29 - 5) + 1 = 25 pages.

4. The rule just formulates the expression for the number of pages read and it eases the calculation for the number of pages read. (Answer)

7 0

3 years ago

a right triangle has one angle that measures 26 degrees. what is the measure of the other acute angle?

patriot [66]

It can be any angle between 1 and 64 since the third angle has to be a right angle or an obtuse angle

8 0

4 years ago

Please answer soon I need this answer very quickly for math. Thank you!

Kazeer [188]

a. First five terms: 9,13,17,21,25

b. Sum of first 25 terms = 1425

c. The given sequence is an arithmetic sequence because the common difference between two consecutive terms is same.

Further explanation:

Given

Formula of sequence

$a_n=4n+5$

<u>1. First 5 terms:</u>

For first 5 terms, we have to put n=1,2,...5,

So,

$For\ n=1\\a_1=4(1)+5\\=4+5\\=9\\For\ n=2\\a_2=4(2)+5\\=8+5\\=13\\For n=3\\a_3=4(3)+5\\=12+5\\=17\\For\ n=4\\a_4= 4(4)+5\\=16+5\\=21\\For\ n=5\\a_5=4(5)+5\\=20+5\\=25\\First\ 5\ terms\ are: 9,13,17,21,25$

<u>2. Sum of first 25 terms:</u>

For that we have to find 25th term first

$a_{25} = 4(25)+5\\=100+5\\=105$

The formula for sum is:

$S_n=\frac{n}{2}(a_1+a_n)}\\Putting\ the\ values\\S_n=\frac{25}{2}(9+105)\\=12.5(114)\\=1425$

<u>3. Type of sequence</u>

The given sequence is an arithmetic sequence because the common difference between two consecutive terms is same.

i.e.

$d=4$

Keywords: Arithmetic sequence, Sum of arithmetic sequence

Learn more about arithmetic sequence at:

#LearnwithBrainly

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4 years ago