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3 years ago

Please help! Math (10 pts)

Mathematics

2 answers:

Wewaii [24]3 years ago

8 0

Its linear because can be quadratic you feel me?

Allisa [31]3 years ago

6 0

It's linear

If you evaluate x when it's 0 you'll get the cut in y, that means the function will pass on (0,7)

The formula for linear functions is y=mx +b

In this case b is 7

M=7-5/0+1

M=2

Now you just write the function down, it would be

F(x) =2x + 7

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Sedbober [7]

Answer:

X-Large

Step-by-step explanation:

8 0

3 years ago

A random sample of 500 registered voters in Phoenix is asked if they favor the use of oxygenated fuels year-round to reduce air

Stells [14]

Answer:

a) 0.0853

b) 0.0000

Step-by-step explanation:

Parameters given stated that;

H₀ : p = 0.6

H₁ : p = 0.6, this explains the acceptance region as;

p° ≤ $\frac{315}{500}$ =0.63 and the region region as p°>0.63 (where p° is known as the sample proportion)

a).

the probability of type I error if exactly 60% is calculated as :

∝ = P (Reject H₀ | H₀ is true)

= P (p°>0.63 | p=0.6)

where p° is represented as pI in the subsequent calculated steps below

= P $[\frac{p°-p}{\sqrt{\frac{p(1-p)}{n}}} >\frac{0.63-p}{\sqrt{\frac{p(1-p)}{n}}} |p=0.6]$

= P $[\frac{p°-0.6}{\sqrt{\frac{0.6(1-0.6)}{500}}} >\frac{0.63-0.6}{\sqrt{\frac{0.6(1-0.6)}{500}}} ]$

= P $[Z>\frac{0.63-0.6}{\sqrt{\frac{0.6(1-0.6)}{500} } } ]$

= P [Z > 1.37]

= 1 - P [Z ≤ 1.37]

= 1 - Ф (1.37)

= 1 - 0.914657 ( from Cumulative Standard Normal Distribution Table)

≅ 0.0853

The probability of Type II error β is stated as:

β = P (Accept H₀ | H₁ is true)

= P [p° ≤ 0.63 | p = 0.75]

where p° is represented as pI in the subsequent calculated steps below

= P $[\frac{p°-p} \sqrt{\frac{p(1-p)}{n} } }\leq \frac{0.63-p}{\sqrt{\frac{p(1-p)}{n} } } | p=0.75]$

= P $[\frac{p°-0.6} \sqrt{\frac{0.75(1-0.75)}{500} } }\leq \frac{0.63-0.75}{\sqrt{\frac{0.75(1-0.75)}{500} } } ]$

= P $[Z\leq\frac{0.63-0.75}{\sqrt{\frac{0.75(1-0.75)}{500} } } ]$

= P [Z ≤ -6.20]

= Ф (-6.20)

≅ 0.0000 (from Cumulative Standard Normal Distribution Table).

6 0

3 years ago

Following the formula (-b+-√b^2-4ac) / 2a, working out -√b^2 - 4ac) / 2a

lina2011 [118]

Answer:

Jsjsjsnsnsksjssshjsiosjs

8 0

3 years ago

Caleb solved this equation and recorded his work. 7.4x + 4.1(2x − 4) = −2.3(x − 6) − 21.6 1. 7.4x + 8.2x − 16.4 = −2.3x + 13.8 −

slamgirl [31]

Answer:

Option B.

Step-by-step explanation:

The given equations is

$7.4x+4.1(2x-4)=-2.3(x-6)-21.6$

The correct steps to solve the above equation are

1. Using distributive property, we get

$7.4x+8.2x-16.4=-2.3x+13.8-21.6$

2. Combining like terms, we get

$15.6x-16.4=-2.3x-7.8$

3. Using addition property of equality, add 2.3x on both sides.

$17.9x-16.4=-7.8$

4. Using addition property of equality, add 16.4 on both sides.

$17.9x=8.6$

5. Using division property of equality, divide both sides by 17.9.

$x\approx 0.48$

In step 2, the like terms were not combined properly on the right side of the equation.

$13.8-21.6=-7.8\neq 35.4$

Therefore, the correct option is B.

5 0

3 years ago

Read 2 more answers

What’s 1/2 times x = 1/2 times 7

Vedmedyk [2.9K]

Answer:

1.75

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Please help! *Math (10 pts)*

Please help! Math (10 pts)