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salantis [7]
3 years ago
6

Sean says that to add a number to -100 and still have -100 is to add zero. Candice says that she can add two numbers to -100 and

still have -100. Who is correct and why ?
Mathematics
2 answers:
atroni [7]3 years ago
8 0
Sean is correct and candice is wrong

Tema [17]3 years ago
3 0
Sean is correct, because he adds 0 to -100, which equals to -100

<em />I dont think Candice is correct however, since you cannot repeat the numbers
(and adding negative numbers is incorrect im assuming)

hope this helps
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olganol [36]
1. Ok so first I would find 22% of 212,000 to do that you do: 22 divide 100 = 0.22

2. Now that you’ve turned 22% into a decimal as 0.22 you find what 22% of 212,000 is like so: 0.22x212,000 =46,640


3. Now that you have to reduce 212,000 but 22% to do this you just subtract: 212,000-46,640= 165,360

They would purchase the house for $165,360
3 0
2 years ago
Anna is making 11 necklaces using 35 beads for each. How many beads (B) are needed to make all of the necklaces?
Fed [463]

Answer:

B/35=11

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the measure of each angle indicated. Round to the nearest tenth.
Sladkaya [172]

Answer:

D

Step-by-step explanation:

So we want to find<em> θ. </em>We are already given the hypotenuse and the side length opposite to <em>θ. </em>Therefore, we can use the trig function sine to find <em>θ. </em>

Recall that:

\sin(\theta)=opp/hyp

Plug in 10.2 for the opposite side and 15 for the hypotenuse:

\sin(\theta)=10.2/15

Solve for <em>θ. </em>Use a calculator:

\theta=\sin^{-1}(10.2/15)\\\theta\approx42.8436\textdegree

The answer is D.

5 0
2 years ago
A researcher records the amount of time (in minutes) that parent child pairs spend on social networking sites to test whether th
ki77a [65]

Answer:

(a) A matched pair design is used to perform the test.

(b) Each sample is of size 30.

(c) The null hypothesis is rejected.

(d) The effect size of the test is medium.

Step-by-step explanation:

A statistical experiment is performed to determine whether the amount of time (in minutes) that parent-child pairs spend on social networking sites to test show any generational differences.

<u>Given</u>:

MD = -42 minutes

t₍₂₉₎ = 4.021

p < 0.05

d = 0.49

The hypothesis is:

<em>H₀</em>: There is no difference between the means, i.e. <em>μ₁</em> = <em>μ₂</em>.

<em>Hₐ</em>: There is a significant difference between the means, i.e. <em>μ₁</em> ≠ <em>μ₂</em>.

(a)

A matched pair design is used to perform the test.

In a matched pair design the participant of the two groups are related in some way. For example, the same sample is tested before and after applying the treatment.

In this case the matched are pairs are of children and their parents. And the treatment is the amount of time spent on social networking sites.

(b)

The degrees of freedom of a matched pair design is:

df = n - 1

29 = n - 1

n = 29 + 1

n = 30

Thus, each sample is of size 30.

(c)

The <em>p</em>-value of the test statistic is < 0.05.

If the <em>p</em>-value is less than the significance level <em>α </em>(say, 0.05) then the null hypothesis is rejected and vise-versa.

Since <em>p</em> < 0.05 the null hypothesis is rejected concluding that there is a significant difference between the amount of time spent on social networking sites by parents and children.

(d)

The estimated value of Cohen's d is, <em>d</em> = 0.49.

A Cohen's d value between the range 0.50 to 0.80 is considered as medium.

Thus, the effect size of the test is medium.

3 0
3 years ago
Simplify. <br><br><br><br> 12.6 • (–4) ÷ 12 • (–3) ÷ 0.5
Evgen [1.6K]
<span>12.6 • (–4) ÷ 12 • (–3) ÷ 0.5
= -50.4 </span>÷ 12 • (–3) ÷ 0.5
= -4.2• (–3) ÷ 0.5
= 12.6 ÷ 0.5
= 25.2
7 0
3 years ago
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