3 years ago

I need help asap plz less than 10 minutes

Mathematics

1 answer:

marissa [1.9K]3 years ago

5 0

Answer:

Im thinking maybe its 6 hours of sleep

Step-by-step explanation:

Well if you search up the amount a regular student needs to sleep so 7 hrs could get you 100 on the test so yeah 6.

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Will mark brainliest! Please help!

ValentinkaMS [17]

Answer:

The dimensions are:

$3(2x+1)$ by $(7x+5)$

Step-by-step explanation:

The area of the rectangle is given as

$A=42x^2+51x+15$

The factored form of this quadratic trinomial gives the dimensions of the rectangle.

We factor 3 first to obtain;

$A=3(14x^2+17x+5)$

We split the middle term to get;

$A=3(14x^2+10x+7x+5)$

We factor within the parenthesis to get;

$A=3(2x(7x+5)+1(7x+5))$

We factor further to get;

$A=3(2x+1)(7x+5)$

The dimensions are:

$3(2x+1)$ by $(7x+5)$

Then the perimeter will be

$2(6x+3+7x+5)=26x+16\:\:\:\boxed{\sqrt{} }$

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3 years ago

Ann needs to read 414 pages in 3 days. how many pages should she read each day?

siniylev [52]

414 divide by 3 =138

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3 years ago

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Stacy is trying to solve the equation 2x - 5 = 10x + 7 . Her first step results in the equation 2x = 15x + 12. Describe her mist

Lelechka [254]

Mistake: you can't add 5 to 10x.
solution: -1.5

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3 years ago

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Perform the indicated operation.(3/a+2) + (4/a-5)

kipiarov [429]

Answer:

$\frac{7(a-1)}{(a+2)(a-5)}$

Step-by-step explanation:

To solve this operation we need to find the common multiple of both denominators and solve for a.

$\frac{3}{a+2} + \frac{4}{a-5} =\frac{3(a-5)+4(a+2)}{(a+2)(a-5)} =\frac{3a-15+4a+8}{(a+2)(a-5)} =\frac{7a-7}{(a+2)(a-5)} =\frac{7(a-1)}{(a+2)(a-5)}$

Thus, the solution is 7(a -1) / (a+2)(a-5)

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4 years ago

Determine the measures of the unknown labeled angles in the diagrams below:

Elan Coil [88]

180 - 34 - (180 - 115). 180°, and the sum of all interior angles in a triangle is 180°.

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4 years ago