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2 years ago

What is this??? 28÷7×4=?

Mathematics

1 answer:

Tanya [424]2 years ago

7 0

Answer: 16

Step-by-step explanation: 28÷7=4

4×4 = 16

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Can somebody help me with B. And C. Please

Crank

Answer:

B) $150 for 15 hours

C) 25 hours

Step-by-step explanation:

B) (15, 150)

C) (25, 250)

6 0

3 years ago

30 minute miles of a smaller rectangle or 3‘ x 9‘ the decimals of a larger rectangle or 5 x 11‘ find the radio out of the perime

densk [106]

Multiply every number

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3 years ago

The College Board provided comparisons of Scholastic Aptitude Test (SAT) scores based on the highest level of education attained

poizon [28]

Answer:

a. $H_{0}:$ u1≤u2

$H_{a} :u1>u2$

b P<0.05 rejected H

Step-by-step explanation:

College High School

485 442

534 580

650 479

554 486

550 528

572 524

497 492

592 478

487 425

533 485

526 390

410 535

515

578

448

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The mean is the average . the sum of number over the number of observation

x1=525

x2=487

s.d1=59.42

s.d2=51.74

n1=16

n2=12 $\alpha =0.05$

Determine the hypothesis

$H_{0}:$ u1≤u2

$H_{a} :u1>u2$

find the degree of freedom $(\frac{s1^2}{n1} +\frac{s2^2}{n2} )^2/(\frac{s1^2}{n1} )^2/n1-1+(s2^2/n2)^2/n2-1\\\\(\frac{59.42^2}{16} +\frac{51.7476^2}{12} )^2/(\frac{59.42^2}{16} )^2/16-1+(51.74^2/12)^2/12-1$

p-value is the probability of obtaining the value of the test statistics. In the column of t-value in the row df=25

0.025<P<0.05

if the P value is actually less than or the same as the significant level, then the null hypothesis is rejected

P<0.05 rejected H

8 0

3 years ago

What is the correct classification of 7x2 + 9x + 4? Select one of the options below as your answer:A. monomial B. binomial C. tr

nikitadnepr [17]

The answer is C. Trinomail

7 0

3 years ago

P= $1,000, t= 6, r= 11%, compounded annually (k = 1)

kobusy [5.1K]

Answer: well if p= $1000 and t=6 and r-11 % then 6k+11=1000 then 11- 1000 is 6k=989 divide 6/ 164.83 i think

Step-by-step explanation:

8 0

3 years ago