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3 years ago

WILL MAKE BRAINLIEST HELP

Mathematics

2 answers:

Hatshy [7]3 years ago

6 0

Answer:

Cant find the measure but do know the equation

Step-by-step explanation:

acute angle= angle<90 degrees

obtuse angle= angle>90

(x>90[/3])-8

Use this and fill in the numbers.

Stels [109]3 years ago

3 0

Answer:

2 half

Step-by-step explanation:

sjbidbasbndjonajndbljak

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Which system of linear inequalities is represented by the graph?

masha68 [24]

For the red line, we have:

gradient ( $m$ ) = 1/3
y-intercept = 3

Equation of straight line is given by $y=mx+c$ , where $m$ is the gradient and $c$ is where the line intercept the y-axis

So we have, $y= \frac{1}{3}x+3$

The shaded part is above the line, hence the first inequality is
$y \geq \frac{1}{3}x+3$

The black line, we have
gradient, $(m)$ = 3
y-intercept = -2

$y=mx+c$
$y=3x-2$ , rearranging gives
$3x-y=2$

The shaded region is to the right of the line, hence the inequality is
$3x-y\ \textgreater \ 2$

Note: The first option should be the correct answer but the inequality sign for <span>y > 1/3x + 3 should be </span> $\geq$

6 0

3 years ago

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What are some ratios that are equivalent to 5/7

lesya692 [45]

10/14, 15/21, 20/28, 25/35

Just multiply numerator and denominator by the same number

5 0

3 years ago

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An article reported that what airline passengers like to do most on long flights is rest or sleep; in a survey of 3697 passenger

slava [35]

Answer:

Step-by-step explanation:

Hello!

The study variable is:

X: number of passengers that rest or sleep during a flight.

The sample taken is n=9 passengers and the probability of success, that is finding a passenger that either rested or sept during the flight, is p=0.80.

I'll use the binomial tables to calculate each probability, these tables give the values of accumulated probability: P(X≤x)

a. P(6)= P(X=6)

To reach the value of selecting exactly 6 passengers you have to look for the probability accumulated until 6 and subtract the probability accumulated until the previous integer:

P(X=6)= P(X≤6)-P(X≤5)= 0.2618-0.0856= 0.1762

b. P(9)= P(X=9)

To know the probability of selecting exactly 9 passengers that either rested or slept you have to do the following:

P(X≤9) - P(X≤8)= 1 - 0.8657= 0.1343

c. P(X≥6)

To know what percentage of the probability distribution is above six, you have to subtract from the total probability -1- the cumulated probability until 6 but without including it:

P(X≥6)= 1 - P(X<6)= 1 - P(X≤5)= 1 - 0.0856= 0.9144

I hope it helps!

6 0

3 years ago

Which value of a would make the following expression completely factored?<br><br> x2 – a

tigry1 [53]

Answer:

a = 4.

Stepby-step explanation:

x^2 - 4 = (x + 2)(x - 2).

8 0

4 years ago

Eileen and her brother Andrew had a bicycle race. Eileen Rode at a speed of 20 ft per second while Andrew Rode at a speed of 15

Julli [10]

Eileen was 600 feet away from the finish line before the race began.

Step-by-step explanation:

Step 1; Eileen rode at a speed of 20 feet per second whereas Andrew rode at a speed of 15 feet per second. So for every second that passes the distance in between decreases by 5 seconds. Assume x is the number of seconds at which the distance in between is 0. The distance in between at the beginning of the race is 150 feet due to the headstart.

Distance between them = Decreasing distance every second × x

150 feet = 5 feet/ second × x

x = 150 feet / 5 feet/second = 30 seconds.

So it takes Eileen 30 seconds to cover the distance between her and Andrew and cross the finishing line at the same time.

Step 2; The race lasted for 30 seconds so we can find the distance Andrew and Eileen traveled by multiplying their speed per second with the total number of seconds.

Distance Andrew traveled = speed per second × total number of seconds

= 15 feet per second × 30 seconds = 450 feet

Distance Eileen traveled = speed per second × total number of seconds

= 20 feet per second × 30 seconds = 600 feet

Graph plot;

The X-axis is time with 5 seconds for each cm

the y-axis is distance with 100 feet for each cm.

Eileen's plot (0,0), (5,100), (10,200), (15,300), (20,400), (25,500), (30,600).

Andrew's plot (0,150), (5,225), (10,300), (15,375), (20,450), (25,525), (30,600).

8 0

3 years ago