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
jeka94
2 years ago
13

Help SOS Help SOS I Dont Know The Answer

Mathematics
1 answer:
SVEN [57.7K]2 years ago
8 0

Answer: 70:80

Step-by-step explanation: I believe this is correct

You might be interested in
Please help and show work !!!!
maria [59]
Answer and work is in the picture !

3 0
2 years ago
Read 2 more answers
Which set of coefficients of the terms in the expansion of the binomial (x+y)^3 is correct ?
BigorU [14]
We are technically FOILing this out... with a power of 3.

(x+y)(x+y)(x+y)

So we can first factor out the first two "x+y"s.

( x^{2} +2xy + y^{2} ), multiplied by the last "x+y".

x^{3} +3 x^{2} y +3x y^{2} + y^{3}

Coefficients are the number that comes in front of a variable. 

In this case, 1 comes in front of x^{3}, 3 comes in front of x^{2} y, 3 comes in front of x y^{2}, and 1 comes in front of y^{3}.

Thus: 1, 3, 3, 1.
         Answer Choice A
4 0
3 years ago
Read 2 more answers
Find the exact value of sin(-15)
koban [17]
1)\ \ \ sin(- \alpha )=-sin \alpha \\2)\ \ \ cos2 \alpha =1-2sin^2 \alpha \ \ \ \Rightarrow\ \ \ 2sin^2 \alpha =1-cos2 \alpha \\\\ \Rightarrow\ \ \ sin \alpha = \sqrt{\frac{\big{1-cos2 \alpha}}{\big{2}}}  \\\\\\sin(-15^0)=-sin15^0=-\sqrt{\frac{\big{1-cos30^0}}{\big{2}}}  =-\sqrt{\frac{\big{1- \frac{ \sqrt{3} }{2} }}{\big{2}}} =-\sqrt{\frac{\big{2- \sqrt{3}}}{\big{4}}} =\\\\ =- \frac{1}{2}  \sqrt{2- \sqrt{3}}
7 0
3 years ago
A student believes that less than 50% of students at his college receive financial aid. A random sample of 120 students was take
marusya05 [52]

Answer:

p= 0.9995 and we can conclude that students receiving aid is more than 50% according to the sample results in 2% significance level.

Step-by-step explanation:

H_{0}: less than or equal 50% of students at his college receive financial aid

H_{a}: more than 50% of students receive financial aid.

According to the nul hypothesis we assume a normal distribution with proportion 50%.

z-score of sample proportion can be calculated using the formula:

z=\frac{X-M}{\frac{s}{\sqrt{N} } } where

  • X is the sample proportion (0.65)
  • M is the null hypothesis proportion (0.5)
  • s is the standard deviation of the sample (\sqrt{0.5*(1-0.5)})
  • N is the sample size (120)

then z=\frac{0.65-0.50}{\frac{\sqrt{0.25}}{\sqrt{120} } } ≈ 3,29

thus p= 0.9995 and since p<0.02 (2%), we reject the null hypothesis.

4 0
3 years ago
I need to know what the answer is and how to do it
lesantik [10]
Sport city because it has the least price and gives you a 15% discount.
3 0
3 years ago
Read 2 more answers
Other questions:
  • HELP
    15·1 answer
  • Choose the best graph that represents the linear equation -24y = 3x + 24
    12·1 answer
  • Research scientists need a certain type of bacteria to conduct an experiment. There are 2,500 bacteria in a certain culture. The
    10·1 answer
  • At a particular academically challenging high school, the average gpa of a high school senior is known to be normally distribute
    14·2 answers
  • Translate the sentence into an equation, then solve A number n minus 5 is 6
    10·1 answer
  • 1) Simplify the following:
    11·1 answer
  • 2) -4x3 + 7x2 – 2x
    15·2 answers
  • Determine all zeros (x2+2x-8)
    11·1 answer
  • Compute <img src="https://tex.z-dn.net/?f=i%2Bi%5E2%2Bi%5E3%2B%5Ccdots%2Bi%5E%7B258%7D%2Bi%5E%7B259%7D" id="TexFormula1" title="
    12·2 answers
  • Kate and Riley are reading the same book. Kate reads 1/3 page per minute, and Riley reads 3/4 page per minute. Kate has already
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!