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Snowcat [4.5K]
3 years ago
15

If y varies directly with x and y=8 when x=10 find y if x=20

Mathematics
1 answer:
charle [14.2K]3 years ago
6 0

Sub to pewdiepie okay

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Use the grouping method to factor the polynomial below completely 3x^3+9x^2+5x+15​
Tomtit [17]

Answer:

(x+3)( 3x^2 +5)

Step-by-step explanation:

3x^3+9x^2+5x+15​

Split into two groups

3x^3+9x^2     +5x+15​

Factor 3x^2 out of the  first group and 5 out of the second group

3x^2 ( x+3)  + 5(x+3)

Factor out x+3

(x+3)( 3x^2 +5)

6 0
3 years ago
Arnold can read 3 pages in 7 minutes. Brenda can read 8 pages in 14 minutes. Who is the faster reader? Justify your answer.
Mrac [35]

Answer:

Brenda

Step-by-step explanation:

You can divide the number of pages by the number of minutes to find the amount of minutes it takes to read 1 page. For Arnold, 3 pages / 7 minutes = 1 page per approximately 0.43 minutes. For Brenda, 8 pages / 14 minutes = 1 page per approximately 0.57 minutes. Brenda reads slightly faster since 0.57 > 0.43

8 0
3 years ago
A right angle has an area of 13m*2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the
Alex_Xolod [135]

The answer is: 117m²

The explanation is shown below:

1. You have the following information given in the problem:

- The triangle has an area of 13 m².

- The dimensions of the triangle are increased by a scale factor of 3.

2. Therefore, to solve the exercise you must multiply the area by 3^{2}=9, as following:

A=(13m^{2})(9)\\A=117m^{2}

5 0
4 years ago
The product of two even numbers is always divisible by 4 true or false
never [62]

Answer: TRUE

<u>Step-by-step explanation:</u>

an even number is divisible by 2.  

Consider even number j which equals 2a and even number k which equals 2b.  Then the product of these two numbers (j and k) = 2a*2b = 4ab.

4ab is divisible by 4.

BONUS:

The product of three even numbers is divisible by 2³

The product of four even numbers is divisible by 2⁴

The product of five even numbers is divisible by 2⁵

do you see the pattern?

7 0
3 years ago
3+n=7<br> 13.75e+39.50n=122.00<br><br> Plzzzz help I will mark your brainliest plzzz help I need it
vitfil [10]
The first one is 4 and the last one is 2.14237024 u can put all of that in if u want
6 0
3 years ago
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