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3 years ago

Click on all and awnse r these

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

6 0

Answer:

the last won

Step-by-step explanation:

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What is the area in polynomial form

rodikova [14]

Answer:

$\orange{ \boxed{ \sf{ ( \: {x}^{2} + 11x + 18 \: ) \: sq. \: units}}}$

Solution :

Area = lenght x width

Lenght = x + 9

Width = x + 2

$\sf \green{area \: = \: (x + 9)(x + 2)} \\ \sf \green{ = \: { {x}^{2} + 11x + 18}}$

4 0

2 years ago

Help me! Pls! I put the points high up I will like and mark brainliest! Promise! Pls help me!

Gemiola [76]

Answer: a. 6 rows 6 people per row, 9 rows 4 people in each row, 36 rows 1 person per row, 18 rows 2 people per row, 12 rows 3 people per row, 9 rows 4 people per row

Step-by-step explanation: 4 rows 9 people, 3 rows 12 people

8 0

3 years ago

You spend 90 minutes practicing flip tricks and slides on your skate board the ratio of time spent on flip tricks to time spent

marshall27 [118]

42 minutes are spent on practicing flip tricks and 48 minutes are spent on practicing slides.

Step-by-step explanation:

Total practicing time = 90 minutes

Ratio of time spent on flip tricks to slides = 7:8

Let,

x be the total time spent on flip tricks and slides, therefore,

Time spent of flip tricks and slides = 7x+8x = 15x

Total time spent practicing = 15x

$15x=90$

Dividing both sides by 15

$\frac{15x}{15}=\frac{90}{15}\\x=6$

Time spent of flip tricks = 7x = 7*6 = 42 minutes

Time spent on slides = 8x = 8*6 = 48 minutes

42 minutes are spent on practicing flip tricks and 48 minutes are spent on practicing slides.

Keywords: ratio, division

Learn more about ratios at:

#LearnwithBrainly

3 0

3 years ago

A food packet is dropped from a helicopter and is modeled by the function f(x) = −15x2 + 6000. The graph below shows the height

melisa1 [442]

General Idea:

Domain of a function means the values of x which will give a DEFINED output for the function.

Applying the concept:

Given that the x represent the time in seconds, f(x) represent the height of food packet.

Time cannot be a negative value, so

$x\geq 0$

The height of the food packet cannot be a negative value, so

$f(x)\geq 0$

We need to replace $-15x^2+6000$ for f(x) in the above inequality to find the domain.

$-15x^2+6000\geq 0 \; \; [Divide \; by\; -15\; on\; both\; sides]\\ \\ \frac{-15x^2}{-15} +\frac{6000}{-15} \leq \frac{0}{-15} \\ \\ x^2-400\leq 0\;[Factoring\;on\;left\;side]\\ \\ (x+200)(x-200)\leq 0$

The possible solutions of the above inequality are given by the intervals $(-\infty , -2], [-2,2], [2,\infty )$ . We need to pick test point from each possible solution interval and check whether that test point make the inequality $(x+200)(x-200)\leq 0$ true. Only the test point from the solution interval [-200, 200] make the inequality true.