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3 years ago

What’s the 16th term?

Mathematics

2 answers:

kramer3 years ago

8 0

Put 16 where n is, then do the arithmetic.

... a(16) = -6 + 3(16 -1)

... a(16) = -6 + 45

... a(16) = 39

Leona [35]3 years ago

6 0

The answer is 39 because you have to plug in 16 for (n-1). Then you do 16-1=15. Then you do 3(15) which is 45. Then you do -6+45=39.

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Kevin spends $11.25 on lunch every week during the school year. If there are 35.5 weeks during the school year, how much does Ke

ASHA 777 [7]

Answer:

399.37

Step-by-step explanation:

multiply the amount each week by the amount of weeks to get the answer :)

7 0

2 years ago

A certain high school class consists of juniors and seniors. There are

Genrish500 [490]

Answer:

10 SENIORS

Step-by-step explanation:

x=# of seniors

y=# of juniors

x+y=23, x=2y-7

plug the value of x in the second equation into the first
(2y-7)+y=23
Remove parentheses
2y-7+y=23
Combine like terms
3y-7=23
Add 7 to BOTH sides
3y=30
divide BOTH sides by 3
3y/3=30/3
y=10
There are 10 juniors in the class

FINAL STEPS
Plug y (which is 10) into the first equation
x+y=23
x+10=23
subtract 10 from BOTH sides
x=13
Since X equals the number of seniors, there are 10 seniors in the class

8 0

3 years ago

Cedric completed the square for the quadratic expression 5x^2−40x+15 in order to determine the minimum value of the expression,

Olegator [25]

Answer:

Step 3 is not correct (should be $(x-4)^2$ , not $(x+4)^2$

Step-by-step explanation:

The expression that we have to simplify is:

$5x^2-40x+15$

We proceed step-by-step, in order to find the mistake did by Cedric:

1) First, we factorize the 5 outside:

$5(\frac{5x^2}{5}-\frac{40x}{5}+\frac{15}{5})=5(x^2-40x+3)$ --> this step is correct

2) We add +16 and -16 inside the brackets:

$5(x^2-8x+16-16+3)$ --> this step is correct

3) We rewrite the term $(x^2-8x+16)$ as the square of a bynomial, which is $(x-4)^2$ , so the expression becomes

$5((x-4)^2-16+3)$ --> we notice that this step is wrong: in fact, Cedric wrote $(x+4)^2$ , which is not correct.

4) Now we continue: we rewrite -16+3 as -13,

$5((x-4)^2-13)$

5) Finally, we multiply the 5 by the terms in the bracket:

$=5(x-4)^2-65$

5 0

2 years ago

What elements in domain has the image 5 under function f(x)= 3x+ 2?

bekas [8.4K]

Answer:

Step-by-step explanation:

hello

calculate x : 3x+2 =5

means : 3x+2-2 =5-2

3x = 3

so : x = 3/3 =1

1 is the element in domain has the image 5 under function f(x)= 3x+ 2

7 0

1 year ago

150in.= yds.<br><br><br> I need to know what goes in the blank yds.means yards

podryga [215]

4.167 is the answer

5 0

3 years ago

Read 2 more answers