1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
blsea [12.9K]
3 years ago
7

. If 2n - 5m + 10 = 0, findi) m, when n=2 ii) n, when m=5​

Mathematics
1 answer:
bulgar [2K]3 years ago
5 0

Answer:

when n = 2; m = 2 \frac{4}{5}

when m=5;   n = 7\frac{1}{2}

Step-by-step explanation:

2n - 5m + 10 = 0

       <u>      -10     -10</u>

2n - 5m = -10

2(2) - 5m = -10

 4 - 5m = -10

 <u>-4            -4</u>

      <u>-5m</u> = <u>-14</u>

        -5       -5

           m = 2 \frac{4}{5}

2n - 5(5) = -10

2n - 25 = -10

<u>     +25     +25</u>

<u>2n</u> = <u>15</u>

2        2

   n = 7\frac{1}{2}

You might be interested in
Jerry spend $42 to by some shirts. Each of the shirts cost the same whole-dollar amount. How many shirts could he have bought?
ikadub [295]
You answer is 6 shirts good sir.  Have a nice day.  :D

5 0
4 years ago
Read 2 more answers
Find the appropriate rejection regions for the large-sample test statistic z in these cases. (Round your answers to two decimal
Usimov [2.4K]

Answer:

a) We have that the significance is given by \alpha =0.01 and we know that we have a right tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 1% of the area on the right and 99% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.01,0,1)"

And we got for this case z_{crit}=2.33

So then the rejection region would be z>2.33

b) We have that the significance is given by \alpha =0.05, \alpha/2 =0.025 and we know that we have a two tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 2.5% of the area on the right and 97.5% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.025,0,1)"

And we got for this case z_{crit}=\pm 1.96

So then the rejection region would be z>1.96 \cup z

Step-by-step explanation:

Part a

We have that the significance is given by \alpha =0.01 and we know that we have a right tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 1% of the area on the right and 99% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.01,0,1)"

And we got for this case z_{crit}=2.33

So then the rejection region would be z>2.33

Part b

We have that the significance is given by \alpha =0.05, \alpha/2 =0.025 and we know that we have a two tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 2.5% of the area on the right and 97.5% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.025,0,1)"

And we got for this case z_{crit}=\pm 1.96

So then the rejection region would be z>1.96 \cup z

7 0
4 years ago
Anu
bija089 [108]

Answer:

Circumference of Circle B=19.625cm

Step-by-step explanation:

The circumference formula is: 2pie(r) = pie(d)

We have diameter of the first circle which is 6. Now, because the diameter of second circle is 25% greater than this,

Hence, we add 25% in 6:

6+25/100 =6+0.25=6.25 cm

Therefore, we have diameter of 6.25 for circle B.

Now, we need to find the circumference of the Circle A.

circumference= pie(d) = pie(6)= 3.14times6= 18.84

Now use the proportional reasoning to find Circumference of Circle B:

circumference of Circle A/diameter Circle A = circumference of Circle B/diameter Circle B

18.84/6=circumference of Circle B/6.25

Cross multiply and divide:

(18.84times6.25)/6 = Circumference of Circle B

Solve:

Circumference of Circle B=19.625cm

Hope this helps!

Mark brainliest if you think i helped! Would really appreciate!

7 0
3 years ago
Help me asap ill give brainliest
disa [49]

Answer:

-6, -2, 1, 8

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Two of the lights at the local stadium are flickering. They both just flickered at the same time. One of the lights flickers eve
irinina [24]
1,665
because 777+888 = 1,665

7 0
4 years ago
Read 2 more answers
Other questions:
  • A man invested $500 in the stock market. During the first week,he gained $200.During the second week, the market was strong and
    15·1 answer
  • There are 17 portable mini suites (a.k.a. cages) in a row at the paws and claws holiday pet resort. they are neatly labeled with
    8·1 answer
  • a 15 foot ladder is leaning against a building .How High up on the building will the ladder reach when the bottom of the ladder
    5·2 answers
  • Please help asap :)
    13·1 answer
  • Two equations are given below:
    10·1 answer
  • Plz I need the answer very fast​
    7·1 answer
  • What is the SEC?
    13·2 answers
  • Solve for b.<br><br> problem: a=3(B+C)<br><br> 1) B=A-C/3<br> 2) B=3A-C/3<br> 3) B=A-3C/3
    12·1 answer
  • I'm just doing this to have an even amount of points​
    9·1 answer
  • What is the absolute value of 4-2i?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!