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
sp2606 [1]
4 years ago
11

Please answer this question I need it fast:

Mathematics
2 answers:
svp [43]4 years ago
6 0
Let's call:
M = necklaces owned by Mary Sue
B = necklaces owned by Betty

You know that:
M + B = 603
M - B = 115

Therefore, when you have the sum and the difference of two numbers, in order to find the biggest number you have to sum the sum and the difference and divide it by 2, and in order to find the smallest number you have to subtract the difference from the sum and divide it by 2:

M = [(M + B) + (M - B)] ÷ 2
   = [603 + 115] ÷ 2
   = 359

B =  [(M + B) - (M - B)] ÷ 2
   = [603 - 115] <span>÷ 2
   = 244
</span>
Hence, Mary Sue has 359 necklaces and Betty has 244 necklaces.
pav-90 [236]4 years ago
4 0

Answer:

mary sue: 359, betty; 244

Step-by-step explanation:

⇔↓⊕㏒㏑∞

You might be interested in
I need help asap i’ll give brainliest
lorasvet [3.4K]

Answer:

x=130 I believe

Step-by-step explanation:

28+8+14+x=180

50+x=180

x=130

5 0
3 years ago
Explain the difference between prime and composite numbers
Fed [463]
Prime only has two factors one and its self a composite number has more factor than one and its self
exsample:     12 -  1,2,3,4,6,12  = 12 is a composite number
                       7  -  1,7                 =prime number 
4 0
3 years ago
A pumpkin is launched from the top of a 20 foot tall platform at an initial velocity of 84 feet per second. The height, h, of th
Gennadij [26K]
<h2>Explanation:</h2>

In this problem we have a pumpkin is launched from the top of a 20 foot tall platform at an initial velocity of 84 feet per second. So the height, h, of the pumpkin at time t seconds after the launch can be modeled by the equation:

h(t) = -16t^2 + 84t + 20

So this is the equation of a parabola. The maximum of this parabola occurs at its vertex. So let's find this vertex:

\text{The x-value of the vertex is}: \\ \\ t=-\frac{b}{2a} \\ \\ \\ Where: \\ \\ a=-16 \\ \\ b=84 \\ \\ c=20 \\ \\ \\ t=-\frac{84}{2(-16)} \\ \\ t=-\frac{84}{-32} \\ \\ t=\frac{21}{8}=2.625 \\ \\ h(2.625)=-16(2.625)^2+84(2.625)+20 \\ \\ h(2.625)=-110.25+220.5+20 \\ \\ h(2.625)=130.25m

Finally, the maximum occurs at time 2.625 seconds when the height is 130.25m

8 0
4 years ago
Which of the following inequalities matches the graph?
TiliK225 [7]
Since the shading on the left side, and the line goes through the x axis, your answer would be B.
5 0
3 years ago
Read 2 more answers
We are planning on introducing a new internet device that should drastically reduce the amount of viruses on personal computers.
Alexus [3.1K]

Answer:

The sample size required is 289.

Step-by-step explanation:

Let <em>p</em> be population proportion of people that would buy the product.

It is provided that the nationwide poll on this type of product and price was run earlier this year, with percentages running from 75% to 80%.

Assume that the sample proportion of people that would buy the product is, \hat p=0.75.

A 95% Confidence Interval is to be constructed with a margin of error of 5%.

We need to determine the sample size required for the 95% Confidence Interval to be within 5% of the actual value.

The formula to compute the margin of error for a (1 - <em>α</em>)% confidence interval of population proportion is:

MOE=z_{\alpha/2}\times\sqrt{\frac{\hat p(1-\hat p)}{n}}

The critical value of <em>z</em> for 95% confidence interval is,

<em>z</em> = 1.96.

Compute the sample size required as follows:

MOE=z_{\alpha/2}\times\sqrt{\frac{\hat p(1-\hat p)}{n}}

      n=[\frac{z_{\alpha/2}\ \sqrt{\hat p(1-\hat p)} }{MOE}]^{2}

         =[\frac{1.96\cdot \sqrt{0.75(1-0.75)} }{0.05}]^{2}\\\\=(16.9741)^{2}\\\\=288.12007081\\\\\approx 289

Thus, the sample size required is 289.

8 0
3 years ago
Other questions:
  • It takes 20 hours to fill the pool using the first hose. It takes 16 hours to fill the pool using the second hose. How long woul
    15·2 answers
  • X + ky = 1
    13·1 answer
  • Please answer quick! im being timed!!!!!!!
    5·1 answer
  • What is the fraction between<br> 2/7 and 5/12 with the lowest denominator<br> possible?
    11·1 answer
  • A book is on sale for $6 off of the regular $24 price. What percent is the discount? [Type your answer as a number.]
    11·2 answers
  • I need help I don’t know what is the scoring rate
    15·1 answer
  • 8.25 x h= 206.25 what is h?
    5·2 answers
  • 25 percent off of $60 is equal to $
    14·2 answers
  • What is a detailed example of simple interest?
    14·1 answer
  • Fill in geometry proofs. ANGLES. ( I WILL GIVE BRAINLIEST! PLS HELP!)<br><br> refer to attachment
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!