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3 years ago

I need help on this math question plis

Mathematics

2 answers:

Nadusha1986 [10]3 years ago

8 0

Answer:

b for the best answer brainlyist plz

Step-by-step explanation:

Monica [59]3 years ago

3 0

Answer:

9/12 + 1/4 = 12/12 or 1

so the answer is A

Step-by-step explanation:

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Pete worked 44 hours and 30 minutes on his new job. He makes $9.86 per hour. For each hour of overtime, he earns time and a half

VikaD [51]

The question did not associate anything with the overtime so, I believe the answer is 416.24

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4 0

3 years ago

Read 2 more answers

A fourth-order polynomial passes through the five points for which the independent and dependent variables, x and y, respectivel

Sladkaya [172]

Answer:

The fourth-order polynomial that passes through the points is $P(x)=2x^4+x^3+3x^2+2x+5$

Step-by-step explanation:

A fourth-order polynomial has this general form:

$P(x)=ax^4+bx^3+cx^2+dx+e$

We need to replace the given points one by one, which leads to a system of 5 equations and 5 variables (namely a,b,c,d,e)

$37=a(-2)^4+b(-2)^3+c(-2)^2+d(-2)+e\\7=a(-1)^4+b(-1)^3+c(-1)^2+d(-1)+e\\5=a(0)^4+b(0)^3+c(0)^2+d(0)+e\\13=a(1)^4+b(1)^3+c(1)^2+d(1)+e\\61=a(2)^4+b(2)^3+c(2)^2+d(2)+e$

We can rewrite this system as follows:

$16a-8b+4c-2d+e=37\\a-b+c-d+e=7\\e=5\\a+b+c+d+e=13\\16a+8b+4c+2d+e=61$

We can use the Gaussian Elimination to solve this system of equations. To use the Gaussian Elimination we need to express the system of linear equations in matrix form (the matrix equation Ax = b).

The coefficient matrix (A) for the above system is

$\left[\begin{array}{ccccc}16&-8&4&-2&1\\1&-1&1&-1&1\\0&0&0&0&1\\1&1&1&1&1\\16&8&4&2&1\end{array}\right]$

the variable matrix (x) is

$\left[\begin{array}{c}a&b&c&d&e\end{array}\right]$

and the constant matrix (b) is

$\left[\begin{array}{c}37&7&5&13&61\end{array}\right]$

The augmented matrix for this system, it is obtained by appending the columns of the coefficient matrix and the constant matrix.

$\left[\begin{array}{ccccc|c}16&-8&4&-2&1&37\\1&-1&1&-1&1&7\\0&0&0&0&1&5\\1&1&1&1&1&13\\16&8&4&2&1&61\end{array}\right]$

The augmented matrix can be transformed by a sequence of elementary row operations to the reduced row echelon form.

$\left[\begin{array}{ccccc|c}1&0&0&0&0&2\\0&1&0&0&0&1\\0&0&1&0&0&3\\0&0&0&1&0&2\\0&0&0&0&1&5\end{array}\right]$

Therefore the solutions are:

$\left\begin{array}{c}a=2&b=1&c=3&d=2&e=5\end{array}\right$

And the polynomial P(x) is:

$P(x)=2x^4+x^3+3x^2+2x+5$

We can check our solution plotting the polynomial and checking that it passes through the points.

4 0

3 years ago

I need to know a equivalent fraction for number 7

AlekseyPX

9/10 is equivalent to 90/100 and the answer under mine or above or the other answer should be reported. They got points for a question they did not answer correctly.

7 0

3 years ago

PLS,PLS,PLS,PLS HELP ME THIS QUESTION IS WORTH 10 POINTS. Which number sequence follows the rule add 4 starting from 2?

saul85 [17]

Answer:

Arithmetic sequence

Step-by-step explanation:

In an arithmetic sequence, the next term on the sequence is obtained by adding a certain value to the first term. This term that is added is uniform throughout the sequence. Once this term is added to the preceding term, the next term of the sequence is obtained. This term that is thus added is known as the common difference of the arithmetic sequence.

So the arithmetic sequence obtained by adding 4 starting from 2 is; 2, 6, 10, 14 .........

5 0

3 years ago

Calculate the amount of interest you'll have at the end of the indicated period.

Alexeev081 [22]

Answer:

$160

Step-by-step explanation:

I = 800 * 5 * 4% (I multiply the time and principal first, so I already have the wholes covered.)

I = 4,000 * 4% (now to convert 4% and 4000 into fractions.)

I = 4000/1 * 1/25 (Cross cancel if needed. GCF is 25.)

I = 160/1 * 1/1 (Just remove 1/1)

I = $160 (There's your answer!)

3 0

3 years ago

I need help on this math question plis ​

I need help on this math question plis