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3 years ago

All of the following are correct except 0 32.5+ 2 = 47 32 +5 - 2 = 12 32+5 2 = 28 32.5+ 2 = 6

Mathematics

1 answer:

n200080 [17]3 years ago

3 0

Answer:

Step-by-step explanation:

3 × 3 - 5 + 2 = 6

9 - 5 + 2 = 6

4 + 2 = 6

Answer = 32-5+2= 6

please mark as brainlist answer

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Recall the equation for a circle with center ( h , k ) and radius r . At what point in the first quadrant does the line with equ

butalik [34]

Answer: The required point = (1.857,8.643)

Step-by-step explanation:

Equation of circle with center (h,k) and radius r: $(x-h)^2+(y-k)^2=r^2$

Given: Radius = 5 , center = (0,4)

Eqation of circle: $(x-0)^2+(y-4)^2=5^2$

$x^2+(y-4)^2=25$

$x^2+(2.5x+4-4)^2=25$ [Using equation y = 2.5 x + 4 ]

$x^2+(2.5x)^2=25$

$x^2+6.25x^2=25$

$7.25x^2=25$

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$=8.6425$

Hence, the required point = (1.857,8.643)

7 0

4 years ago

Choose a system of equations with the same solution as the following system: 6x + 2y = −6 3x − 4y = −18

jeka57 [31]

Answer:

I do know that y = 3 and that x = -2, so any system that has that solution is correct.

Step-by-step explanation:

Multiplying the second equation by -2 and adding the equations will cancel out the x variable. The remaining equation is:

10y = 30. Therefore, y must be 3. Substituting y in for the first equation, we get:

6x + 6 = -6. That means x must be -2. I checked my work with the second equation:

-6 - 12 = -18.

The system results in a true statement, so the answer is y = 3 and x = -2.

8 0

3 years ago

Read 2 more answers

HELP NEEDED PLSSS<br><br> pls answer fast and make sure it’s right. also, pls show all work! tysm!!!

Andrei [34K]

Answer:

3.00312839

Step-by-step explanation:

Volume of a cylinder= piR^2h

In this case we need to find the radius.

r= $\sqrt{V/\pi h$ = $\sqrt{170/\pi6$ = 3.00313in

8 0

3 years ago

Alayna worked 44 hours last week. Her hourly rate is $9.00. Alayna’s gross pay for last week was $

ddd [48]

Answer:

<h2>396 dollars</h2>

Step-by-step explanation:

$44 \: hours \: \times 9 \: \frac{dollars}{hour} =$

$396 \: dollars$

Hope I helped, if you have any questions please let me know! Brainliest is always Appreciated!

6 0

3 years ago

Consolidated Power, a large electric power utility, has just built a modern nuclear power plant. This plant discharges waste wat

Gemiola [76]

Answer:

We conclude that the plant should shut down.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 60

Sample mean, $\bar{x}$ = 61.498

Sample size, n = 100

Alpha, α = 0.05

Population standard deviation, σ = 6

a) First, we design the null and the alternate hypothesis such that the power plant will be shut down when the null hypothesis is rejected.

$H_{0}: \mu \leq 60\\H_A: \mu > 60$

We use One-tailed(right) z test to perform this hypothesis.

b) Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{61.498 - 60}{\frac{6}{\sqrt{100}} } = 2.49$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.64$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, the temperature of waste water discharged is greater than 60°F. We conclude that the power plant will shut down.

Calculating the p-value from the z-table:

P-value = 0.0063

Since,

P-value < Significance level

We reject the null hypothesis and accept the alternate hypothesis. Thus, the temperature of waste water discharged is greater than 60°F. We conclude that the power plant will shut down.

7 0

4 years ago

All of the following are correct except 0 32.5+ 2 = 47 32 +5 - 2 = 12 32+5 2 = 28 32.5+ 2 = 6​

All of the following are correct except 0 32.5+ 2 = 47 32 +5 - 2 = 12 32+5 2 = 28 32.5+ 2 = 6