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
horrorfan [7]
3 years ago
14

9y -4y+3 if y =7 solve this

Mathematics
1 answer:
BigorU [14]3 years ago
5 0
Plug 7 into each y. 9(7) -4(7) +3
63-28+3
The answer is 38
You might be interested in
What is 15+9+20+22+9 then x 5?
AfilCa [17]

Answer: oops 375 idk what happend

Step-by-step explanation:

tysm

6 0
3 years ago
Read 2 more answers
What is 5 8/12 as a mixed number in its simplest form
Elena-2011 [213]

Answer:

5 2/3

Step-by-step explanation:

Just keep simplifying 8/12 until you end up with 2/3

Find the GCF of both the numerator and denominator and you end up with 2/3

Just to make it clear 8/12 = 2/3

6 0
3 years ago
What is the diameter of this circle?
skelet666 [1.2K]
10cm

5cm is shown above all u gotta do is multiply by two OR add 5+5 to get 10 cm.
3 0
3 years ago
A college counselor is interested in estimating how many credits a student typically enrolls in each semester. The counselor dec
Ket [755]

Answer:

(a) The usual load is not 13 credits.

(b) The probability that a a student at this college takes 16 or more credits is 0.1093.

Step-by-step explanation:

According to the Central limit theorem, if a large sample (<em>n</em> ≥ 30) is selected from an unknown population then the sampling distribution of sample mean follows a Normal distribution.

The information provided is:

Min.=8\\Q_{1}=13\\Median=14\\Mean=13.65\\SD=1.91\\Q_{3}=15\\Max.=18

The sample size is, <em>n</em> = 100.

The sample size is large enough for estimating the population mean from the sample mean and the population standard deviation from the sample standard deviation.

So,

\mu_{\bar x}=\bar x=13.65\\SE=\frac{s}{\sqrt{n}}=\frac{1.91}{\sqrt{100}}=0.191

(a)

The null hypothesis is:

<em>H</em>₀: The usual load is 13 credits, i.e. <em>μ</em> = 13.

Assume that the significance level of the test is, <em>α</em> = 0.05.

Construct a (1 - <em>α</em>) % confidence interval for population mean to check the claim.

The (1 - <em>α</em>) % confidence interval for population mean is given by:

CI=\bar x\pm z_{\alpha/2}\times SE

For 5% level of significance the two tailed critical value of <em>z</em> is:

z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

Construct the 95% confidence interval as follows:

CI=\bar x\pm z_{\alpha/2}\times SE\\=13.65\pm (1.96\times0.191)\\=13.65\pm0.3744\\=(13.2756, 14.0244)\\=(13.28, 14.02)

As the null value, <em>μ</em> = 13 is not included in the 95% confidence interval the null hypothesis will be rejected.

Thus, it can be concluded that the usual load is not 13 credits.

(b)

Compute the probability that a a student at this college takes 16 or more credits as follows:

P(X\geq 16)=P(\frac{X-\mu}{\sigma}\geq \frac{16-13.65}{1.91})\\=P(Z>1.23)\\=1-P(Z

Thus, the probability that a a student at this college takes 16 or more credits is 0.1093.

3 0
2 years ago
Read 2 more answers
a train has 3 engines, 52 boxcars, and 1 caboose. at every stop, it picks up 8 more boxcars. how many total cars ( engines, cars
Damm [24]
Picking up 8 boxcars after 5 stops makes a total of 40 new boxcars . . . add the original 3 engines, 52 boxcars, and 1 caboose to get a total of . . . 3 + 52 + 1 + 8 + 8 + 8 + 8 + 8 = 96 total cars
8 0
3 years ago
Other questions:
  • Consider the parent quadratic function f(x) = x2.
    15·1 answer
  • Help me ASAP plsssssssssssssssssssssssssssssssssss
    6·1 answer
  • A company specializes in custom home resales in an exclusive subdivision. A random sample of nine custom homes currently listed
    10·1 answer
  • Express 3^2 = x as a logarithmic equation.
    9·1 answer
  • Please help! Correct answer only, please! Find the product A · A^t A. B. C. D.
    14·1 answer
  • Simplify the following expression by combining like terms.
    15·1 answer
  • One of the acute angles in a right triangle has a measure of 36.6°. What is the measure of the other acute angle?
    9·1 answer
  • PLEASE HELP<br> Write an equivalent expression for -5x+3×2.5x
    7·2 answers
  • Multiply 5/12 and the multiplicative inverse of -1/4​
    11·1 answer
  • I cant get this at all
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!