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4 years ago

Solve the equation m²+4m=-2

Mathematics

2 answers:

lozanna [386]4 years ago

7 0

Answer: There's two solutions to this problem:

1. m =(4-√8)/2=2-√ 2 = 0.586

2. m =(4+√8)/2=2+√ 2 = 3.414

UNO [17]4 years ago

4 0

Step 1: Subtract -2 from both sides.
m2+4m−(−2)=−2−(−2)
m2+4m+2=0
Step 2: Use quadratic formula with a=1, b=4, c=2.
m=−b±√b2−4ac2a
m=−(4)±√(4)2−4(1)(2)2(1)
m=−4±√82
m=−2+√2 or m=−2−√2

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he response times for a random sample of 40 medical emergencies were tabulated. The sample mean is 13.25 minutes. The population

Gwar [14]

Answer:

The calculated value Z = 2.5 > 1.96 at 0.05 level of significance

The null hypothesis is rejected

The Alternative hypothesis is rejected

The EMS director wants to service goal of 12 minutes or less is being achieved

Step-by-step explanation:

Step(i):-

Given that the size of the random sample = 40

Given that the mean of the sample (x ⁻) = 13.25

Given that the standard deviation of the Population = 3.2 minutes

Level of significance = 0.05

The mean of the Population (μ) = 12

Step(ii):-

Null hypothesis:-H₀: (μ) = 12

Alternative Hypothesis: H₁ : μ < 12

Test statistic

$Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{13.25-12 }{\frac{3.2}{\sqrt{40} } }$

Z = 2.5

The tabulated value Z₀.₀₅ = 1.96

The calculated value Z = 2.5 > 1.96 at 0.05 level of significance

The null hypothesis is rejected

The Alternative hypothesis is rejected

Final answer:-

The EMS director wants to service goal of 12 minutes or less is being achieved

3 0

3 years ago

Goode manufacturing pays Sam young a $2440 monthly salary plus a 6% commission on merchandise he sells each month. Assume sam's

Sloan [31]

1. Amount of Commission >>>

The commission is 6% of all sales.

Given,

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We will calculate 6% of 57,000. Shown below:

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Answer: $3420

2. Gross Pay >>>

The gross pay is monthly salary plus commissions.

Given,

Monthly Salary = $2440

Commision Pay = $3420

Thus,

Gross Pay = $2440 + $3420 = $5820

Answer: $5820

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1 year ago

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n200080 [17]

A. B. and C. are incorrect expressions for the slope.

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3 years ago

Read 2 more answers

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xenn [34]

X=12

36 + 12 = 48

48/4 = 12

6 0

3 years ago

when Apple sells their iPads they increase the price $50 from what it cost then to actually make the iPads one Apple Store sold

Anvisha [2.4K]

First things you have to do is figure out how much they increased the iPads by:

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Now divide that by 10 to get the amount for one iPad:

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One iPad actually costs $450 to make.

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3 years ago