Can help me with this <br> Please?

If you’re good with geometry can you help me?

Paladinen [302]

Answer:

a: AB is perpendicular to CD

b: AM is equal in length to BM

4 0

3 years ago

I literally luv u if u help omg

WINSTONCH [101]

Answer:

9.49

Step-by-step explanation:

Divide 47.45 by five to find the answer.

7 0

2 years ago

Read 2 more answers

A chemist is mixing 45% salt solution with a 30% salt solution to make 60 L of a new solution that will contain 40% salt. How mu

Alinara [238K]

Answer:

30 ml of 45% salt solution and 20 ml of 30% salt solution.

Step-by-step explanation:

Let x be the amount of 45% salt solution and y be the amount of 30% salt solution

the two equation will be:

x+y=60 -- A

0.45x+0.3y=0.4(60) -- B

Solve by substitution

Rewrite Equation A

x+y=60

x=60-y --- C

Substitute C into B

0.45(60-y)+0.3y=24

27-0.45y+0.3y=24

-0.15y=-3

y=20

<u>Substitute</u> the y=20 into equation C

x=60-20

x=30

Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.

3 0

2 years ago

In order to justify this claim for the Ferengi a sample of 16 coils is taken. For this sample set, the mean warp phase flux is f

Kay [80]

Answer:

The responses to these question can be defined as follows:

Step-by-step explanation:

$n = 16\\\\ \bar{x}= 73.7\\\\\sigma = 12\\\\a = 0.05\ or\ a = 0.10\\\\H_{o} \ : \mu = 68\\\\H_{a} \ : \mu \neq 68\\\\a = 0.05\\\\$

critical values $=\pm t0.025,15 = \pm 2.131\\\\$

$(n-1) = 15^{\circ}\\\\a = 0.10\\\\$

critical values $= \pm t0.05,15 = \pm 1.753\\\\$

$(n-1) = 15^{\circ}\\\\$

Testing the statistic values:

$t = \frac{x-\mu_{0}}{ \frac{s}{\sqrt{n}}}\\\\$

$= \frac{73.7-68}{(\frac{12}{\sqrt{16}})}\\\\\ = \frac{5.7}{(\frac{12}{4})}\\\\ = \frac{5.7}{(3)}\\\\ = 1.9\\$

Test statistic ta $= -1.90\ lies$

The critical values $\pm t_{0.05,15} =\pm 1.753$

It is in the region of dismissal. We dismiss the 10% significant null hypothesis.

$t_a = 1.90 \\\\df = 15\\\\a = 0.05\\\\p-value = 076831\\\\$

P - value is greater than the level of significance a= 0.05

Null hypothesis we don't reject. At a 95% level, the claim is justified.

$t_a = 1.90\\\\ df = 15\\\\ a = 0.10\\\\p-value = 076831\\\\$

P - value below the meaning level a = 0.10, we reject the hypothesis null. At a level of 90% the claim is not justified.

3 0

2 years ago

Suppose the area of a circle is 254.4696 square inches. Whats the radius of the circle (use pie=3.1416. A. 18 in. B. 81 in. C. 9

zalisa [80]

Answer:

The radius of the circle is 9 in

Choice C is correct

Step-by-step explanation:

254.4696 square inches. Whats the radius of the circle (use pie=3.1416.

The area of a circle with radius r is given as;

$A=\pi *r^{2}$

We substitute the given area and the value of pi given to solve for the radius;

$254.4696=3.1416*r^{2}\\\\r^{2}=\frac{254.4696}{3.1416}\\\\r^{2}=81\\\\r=\sqrt{81}=9\\\\r=9$

6 0

3 years ago

Can help me with this Please?