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Elena L [17]
3 years ago
8

[-14] + [5] please heeellllp

Mathematics
2 answers:
Firlakuza [10]3 years ago
5 0
 -14     14
+  5       - 5                 When you are adding a positive to a negative..remove the 
-------   -------                negative sign and subtract instead of adding then when you
                9  : -9             you get your final answer add the negative sign in front of it                                            again..........I hope this helps you :)
max2010maxim [7]3 years ago
5 0
Your answer would be -9 

Remember To ↓

Negative and Negative = Positive
Negative and Positive = Negative
Positive and Negative = Negative
 Positive and Positive = Positive 
 
Negatives is always goes to the left side on a timeline (downward) while Positives on the other hand,  always goes to the right side on a timelime  (upward)

Sometimes, we can change the symbols in integers 

For this equation we replaced the addition to a subtraction 

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The residents of a city voted on whether to raise property taxes. The ratio of yes votes to no votes was 3 to 5. If there were 7
Zinaida [17]

Answer:

2967 yes votes

Step-by-step explanation:

Welcome to Brainly!

One way of doing this problem follows:

Find the ratio, r, mentioned in the problem statement.  To do this,

write the equation 3r + 5r = 7912 and solve this for r:

8r = 7912, so that r = 989.

Then the number of yes votes was 3(989), or 2967, and the number of no votes was 5(989), or 4947.

check:  Does the ratio 2967/4947 equal 3/5?  yes.

There were 2967 yes votes.

8 0
3 years ago
A ÷ (2 + 1.5) for a = 14<br><br> dont spam links and this is 6th grade work
IRINA_888 [86]

Answer:

49

Step-by-step explanation:

2+1.5=3.5

49/3.5=14

4 0
2 years ago
Read 2 more answers
Does a statistics course improve a student's mathematics skills,as measured by a national test? Suppose a random sample of 13 st
viva [34]

Answer:

There is not enough evidence to support the claim that the scores after the stats course are significantly higher than the scores before (the difference in the scores is higher than 0).

P-value=0.042.

Step-by-step explanation:

The question is incomplete:

The data of the scores for each student is:

Before    After

430        465

485        475

520        535

360        410

440        425

500        505

425        450

470        480

515        520

430        430

450        460

495        500

540        530

We will generate a sample for the difference of scores (before - after) and test that sample.

The sample of the difference is [35 -10 15 50 -15 5 25 10 5 0 10 5 -10]

This sample, of size n=13, has a mean of 9.615 and a standard deviation of 18.423.

The claim is that the scores after the stats course are significantly higher than the scores before (the difference in the scores is higher than 0).

Then, the null and alternative hypothesis are:

H_0: \mu=0\\\\H_a:\mu> 0

The significance level is 0.01.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{18.423}{\sqrt{13}}=5.11

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{9.615-0}{5.11}=\dfrac{9.615}{5.11}=1.882

The degrees of freedom for this sample size are:

df=n-1=13-1=12

This test is a right-tailed test, with 12 degrees of freedom and t=1.882, so the P-value for this test is calculated as (using a t-table):

P-value=P(t>1.882)=0.042

As the P-value (0.042) is bigger than the significance level (0.01), the effect is  not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the scores after the stats course are significantly higher than the scores before (the difference in the scores is higher than 0).

4 0
3 years ago
Write the equation for the proportional relationship. (Don't use spaces)
never [62]
Y=3.4x
2*3.4=6.8
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11*3.4=37.4
3 0
3 years ago
You are asked to draw a triangle with side lengths of 10 inches, 7 inches, and 2 inches. How many triangles like this can you dr
Inessa05 [86]
Well, if you say it's A...  But that does make sense.  Using the triangle inequality theorem, there is only one triangle you can make from that. 
6 0
3 years ago
Read 2 more answers
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