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AlexFokin [52]
3 years ago
8

Yooo plz help asap!!! marking brainiest!!!

Mathematics
1 answer:
Fudgin [204]3 years ago
3 0

Answer: 3x^2 - 16x + 15

Step-by-step explanation:

5x * 3x = 15x^2

-7 * 3x = -21x

5x * 1 = 5x

-21x + 5x = -16x

5x^2 - 17x^2 + 15x^2 = -12x^2 + 15x^2 = 3x^2

13x - 7x - 22x = 6x - 22x = -16x

- 4 + 19 = 15

______________________

3x^2 - 16x + 15

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8. Which expression is greatest? Justify your answer.<br> a. 4 X -5<br> b. -5 + 4<br> c. -4- (-5)
vladimir1956 [14]

Answer:

c

Step-by-step explanation:

i think this is the greatest because if you solve all of the expressions you will find out that this is the greatest.

a.4×-5=-20

b.-5+4=-1

c.-4-(-5)=1

therefore 1 is the greatest so the expression c is the greatest.

I hope this helps

3 0
3 years ago
Read 2 more answers
How do I do this trying my best but I can’t please help T_T
Sever21 [200]

Use algebra.

Let the number of stickers each had in the beginning = x stickers.

Ray lost 10 we represent this by

x - 10 ( = no. stickers he has now)

Tom bought 200 so the number of stickers he now has

= x + 200

Rays has 1/4 as much as Tom so we can now create the equation

1/4(x + 200) = x - 10

Soling for x:-

1/4 x + 50 = x - 10

60 = 3/4 x

x = 60 * 4/3 = 80

Answer they had 80 stickers at first.

4 0
3 years ago
Find the altitude and area of an equilateral triangle
Nataliya [291]
If you look at the attached graphic, you will see that the altitude (or height) of an equilateral triangle is:
Height = side length * sq root (3) / 2
Area = side^2 * sq root (3) / 4




4 0
3 years ago
You buy shoes for $57.84. the sales tax rate is 4%. estimate the sales tax. show your work.
aivan3 [116]
4% of $57.84 
= 2.31 est. is sales tax


3 0
3 years ago
76 div 4<br><br> a)15<br><br> b) 8<br><br> c) 19<br><br> d) 0<br><br> Explain
Sunny_sXe [5.5K]

Answer:

C. 19.  

Step-by-step explanation:

Let's find the answer.

Step 1:  divide the first number of 76, which is 7, by 4 and find the integer part.

7/4=1.75, so the integer part is 1.

Step 2: subtract from 7 the (integer part times 4)

7-(1*4)=3

Step 3: put toether the result (3) and the second number of 76, which is 6, so the result is 36.

Step 4: find how many times we need to add 4s to reach 36, so:

4+4+4+4+4+4+4+4+4=36 which means that:

36/4=9

Step 5: put together the two resulted numbers calculated in step 1, which is 1, and step 4, which is 9:

1 and 9 giving 19, so the answer is:

76/4=19.

In conclusion the answer is C. 19. 

6 0
3 years ago
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