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3 years ago

Simplify: (−5x + 7) − (x2 − 3x + 2). Write your answer in standard form.

Mathematics

1 answer:

AfilCa [17]3 years ago

7 0

Answer:

$- x ^{2} - 2x + 5$

pls mark as brainliest lol

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A system of equations is graphed on the coordinate plane.

MA_775_DIABLO [31]

A system of equations is graphed on the coordinate plane.

2y=3x−14
y=6x−2
A. No solution
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C. Infinitely many solutions

4 0

3 years ago

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F(x) = [[x]], what is f(9)?

Inga [223]

Okay so in this expression, the variable x is set to 9.

Because this expression is just x = x, whatever the value of x is will be the same for both x's.

So, f(9) = 9

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3 years ago

Two people enter a whispering gallery and want to know where they should stand so they can hear the other person's whisper. The

kati45 [8]

Answer:

The two people should stand 40 feet from the center so that they can hear each other whisper

Step-by-step explanation:

From the question

Width of the gallery = 100 feet

Width = 2a

a = Width/2

a = 100/2 = 50 feet

Height of the gallery = b = 30 feet

Hence, the distance is

d² = a² - b²

d = √a² - b²

d = √50² - 30²

d = √2500 - 900

d = √1600

d = 40 feet

Hence, the two people should stand 40 feet from the center so that they can hear each other whisper.

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3 years ago

What the expression is?

Stolb23 [73]

Answer:

Step-by-step explanation:

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3 years ago

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A random sample of 38 wheel chair users were asked whether they preferred cushion type A or B, and 28 of them preferred type A w

-BARSIC- [3]

Answer:

The statement that cushion A is twice as popular as cushion B cannot be verified

Step-by-step explanation:

From the question we are told that:

Sample size n=38

Type a size A $X_a=28$

Type a size B $X_b=10$

Generally the probability of choosing cushion A P(a) is mathematically given by

$P(a)=\frac{28}{38}$

$P(a)=0.73$

Generally the equation for A to be twice as popular as B is mathematically given by

$P(b)+2P(b)=3P$

Therefore Hypothesis

$Null H_0: p \leq \frac{2P}{3P} \\Altenative H_A:p>\frac{2P}{3P}$

Generally the equation normal approx of p value is mathematically given by

$z=\frac{x-np_0-0.5}{\sqrt{np_0(1-p_0)} }$

$z=\frac{28-(38*2/3)_0-0.5}{\sqrt{38*2/3*1/3} }$

$z=0.75$

Therefore from distribution table

$Pvalue=1-\theta (0.75)$

$Pvalue=0.227$

Therefore there is no sufficient evidence to disagree with the Null hypothesis $H_0$

Therefore the statement that cushion A is twice as popular as cushion B cannot be verified

7 0

3 years ago