All categories

3 years ago

Find the difference: -10 - 5 = *

Mathematics

2 answers:

lakkis [162]3 years ago

4 0

Answer:

-15 is your answer

Step-by-step explanation:

-10-5=-1

weqwewe [10]3 years ago

3 0

Answer:

the answer is -15

Step-by-step explanation:

because you just add them put keep your negative

You might be interested in

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

7 0

4 years ago

I need help with this problem <br> x²﹣9x﹣15=﹣5

icang [17]

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

x=10,−1

7 0

3 years ago

Read 2 more answers

Construct the discrete probability distribution for the random variable described. Express the probabilities as simplified fract

lisov135 [29]

Answer:

$P(X = 0) = 0.03125$

$P(X = 1) = 0.15625$

$P(X = 2) = 0.3125$

$P(X = 3) = 0.3125$

$P(X = 4) = 0.15625$

$P(X = 5) = 0.03125$

Step-by-step explanation:

For each toss, there are only two possible outcomes. Either it is tails, or it is not. The probability of a toss resulting in tails is independent of any other toss, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

Fair coin:

Equally as likely to be heads or tails, so $p = 0.5$

5 tosses:

This means that $n = 5$

Probability distribution:

Probability of each outcome, so:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{5,0}.(0.5)^{0}.(0.5)^{5} = 0.03125$

$P(X = 1) = C_{5,1}.(0.5)^{1}.(0.5)^{4} = 0.15625$

$P(X = 2) = C_{5,2}.(0.5)^{2}.(0.5)^{3} = 0.3125$

$P(X = 3) = C_{5,3}.(0.5)^{3}.(0.5)^{2} = 0.3125$

$P(X = 4) = C_{5,4}.(0.5)^{4}.(0.5)^{1} = 0.15625$

$P(X = 5) = C_{5,5}.(0.5)^{5}.(0.5)^{0} = 0.03125$

5 0

3 years ago

Ethan burns 650 calories when he runs for 1 hour. Soppose he runs 5 hours in one week

alex41 [277]

650 x 5=3250 calories

3 0

3 years ago

Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the

xxTIMURxx [149]

Answer:

Q1) Final cost = y*0.85*1.05

Q2) Perimeter = 0.1*x - 16

Q3) One over five ( m - 100)

Step-by-step explanation:

We are given three question as follows:

Q1) Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the DVD. Write an expression that can be used to determine the final cost of the DVD.

Solution:

Note: The effect of each percentage on original price is as follows, where y is the original price of the DVD:

Discount of 15 % = Price reduced by 0.15*y

Sales Tax of 5% = Price increased by 0.05*y

- The resulting prices from each percentage is:

Amount left after discount = y - 0.15*y = 0.85*y

Amount after tax = y + 0.05*y = 1.05*y

- The factors of each affect are:

Factor of discount = 0.85

Factor of Tax = 1.05

Hence, The factors are multiplied by the original cost to get the combined effect as follows:

Answer: Final cost = y*0.85*1.05

Q2) Write an expression for the perimeter of the triangle shown below: A triangle is shown with side lengths labeled 0.5*x + 9, 3x, and - 3.4*x - 25.

Solution:

The perimeter of the triangle is the sum of all 3 sides given:

Perimeter = (0.5*x + 9) + (3x) + ( -3.4*x - 25 )

Perimeter = (0.5*x + 3x - 3.4x) + ( 9 - 25 )

Answer: Perimeter = 0.1*x - 16

Q3) Which expression is equivalent to one over five*m − 20?

Solution:

- Re-write expression:

(1 / 5)*m - 20

Take LCM of the denominator:

(m - 100) / 5

Answer: One over five ( m - 100)

7 0

3 years ago

Read 2 more answers