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Dennis_Churaev [7]
3 years ago
9

EASY MATH QUESTION PLEASE HELP

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
3 0
F(x)=3x^2-5 when x=-11
f(-11)=3(-11)^2-5
f(-11)=-33^2-5
f(-11)=1089-5
f(-11)= 1084

Hope this could help!
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Help with this please
Alik [6]

Answer:

Yes, the given parallelogram is a rectangle.

Step-by-step explanation:

The vertices of parallelogram are J(-5,0), K(1,4), L(3,1) and M(-3,-3).

The slope formula is

m=\frac{y_2-y_1}{x_2-x_1}

JK=\frac{4-0}{1-(-5)}=\frac{4}{6}=\frac{2}{3}

KL=\frac{1-4}{3-1}=\frac{-3}{2}

LM=\frac{-3-1}{-3-3}=\frac{-4}{-6}=\frac{2}{3}

JM=\frac{-3-0}{-3-(-5)}=\frac{-3}{2}

The slopes of opposites sides are same it means they are parallel to each other.

The product of slopes of two consecutive sides is

\frac{2}{3}\times \frac{-3}{2}=-1

Since the product of slopes of two consecutive sides is -1, therefore the consecutive sides are perpendicular to each other.

Yes, the given parallelogram is a rectangle.

7 0
4 years ago
Ordered pairs of y=2/3x+1
Mrrafil [7]

Answer:

(-1.5,0) (0,1)

Step-by-step explanation:

used desmos

6 0
3 years ago
Tell which number is greater.<br><br> 76%, 0.67
Mariana [72]

Answer:

76%

Step-by-step explanation:

first use the calculator you might find the answer on it even the calculator on your own phone

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8 0
3 years ago
A survey study is to be made to estimate the proportion of residents of a certain suburb who favor the construction of a public
lesya [120]

Answer: 601

Step-by-step explanation:

When the prior estimate of population proportion is not given , the formula we apply to find sample size :

n=0.25(\dfrac{z^*}{E})^2

, where z* = critical z-value

E=Margin of error

Given : Margin of error = 0.04

Confidence level = 95%

We know that , according to the z-table , the critical value for 95% confidence interval = z*= 1.960

Then, the required sample size : n=0.25(\dfrac{1.960}{0.04})^2

n=0.25(49)^2

n=0.25(2401)=600.25\approx601

Hence, the required minimum sample size = 601

4 0
3 years ago
A fireman's water hose shoots 320 kg of water each second against the door of a building. The velocity of the water is 20 m/s an
NeX [460]

Answer:

6400\ \text{N}

Step-by-step explanation:

\dfrac{m}{t} = Mass flow rate of water = 320 kg/s

m = Mass of water on the door

t = Time

v = Velocity of water on the door = 20 m/s

Force is given by

F=\dfrac{m}{t}v\\\Rightarrow F=320\times 20\\\Rightarrow F=6400\ \text{N}

The average force is exerted by the stream of water is 6400\ \text{N}.

3 0
3 years ago
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