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2 years ago

Need help with homework plz and thank u :)

Mathematics

2 answers:

olga2289 [7]2 years ago

7 0

Answer:

For part a you need to factor. X to the power of 2 is 2x. when you add it its turns into 2x+10x+16=0

2x+10x=12x

12x+16 will be your final answer

Step-by-step explanation:

Vinil7 [7]2 years ago

7 0

To factorise you have to find what multiplies to the number without an x and adds to the number with x
What times to 16 and add to 10?
8 and 2
Put these in brackets with x
(x+8)(x+2)=0
To find what x is you need to make both bracket equal zero
The easy way to do this is to flip the sign
x=-8
x=-2
The solutions represent the roots of the graph which is when it crosses the x-axis. The two solutions represent what x would equal when y=0 in this equation.

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If The 3rd term of an A.S is and 5th term is . What is an A.P?

Bad White [126]

Question:

If The 3rd term of an A.S 23 is and 5th term is 15 .P What is an A.?

Answer:

A.P is 31, 27, 23 ,19, 15, 11, 7, 3

Step-by-step explanation:

Given:

3rd term = 23

5th term = 15

To Find:

The arithmetic Progression = ?

Solution:

Let

$a_1$ be the first term and d be difference

Then the arithmetic progression will be ,

$a_1 , (a_1+d),(a_1 +2d),......(a_1+(n-1)d)$

From the question ,

third term = 13

$(a_1 +2d) = 23$ -------------(1)

Similarly

$(a_1 +4d) = 15$ -----------------(2)

Subtracting (1) from (2) we get

-2d =8

$d = \frac{8}{2}$

d = -4

Substituting d = 4 in equation 1, we get

$(a_1 +2(-4)) = 23$

$(a_1 -8) = 23$

$a_1 = 23 +8$

$a_1 = 31$

$a_1 , (a_1+d),(a_1 +2d),......(a_1+(n-1)d)$

= 31 ,(31 +(-4)) ,(31 +2(-4)), (31+3(-4)).........

=> 31, 27, 23 , 19, 15, 11,7,3

3 0

4 years ago

How many 1/2 inch cubes does it take to fill a box with width 4 inches, length 2 1/2 inches, and height 1 1/2?

pogonyaev

120 , 1/2 cubes in order to fill the entire cube

3 0

2 years ago

Please anyone help me :(

QveST [7]

The answer is B. An easy way to check is to use "Math-way". Just plug in a number for n and solve!

Hope this helps!

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3 years ago

A data table shows that as the input (x) increases by 1, the output (y) decreases by 7. When x is 0, y is –2. What is the equati

Savatey [412]

X 0 1 2 ...
y -2 -9 -16...
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7 0

3 years ago

A person invests 10000 dollars in a bank. The bank pays 4.5% interest compounded

Greeley [361]

The person would have to leave the money in the bank for 7.8 years for it to reach 13,500 dollars.

Step-by-step explanation:

Step 1; First we must calculate how much interest is generated for a single year. The annual interest rate is 4.5% i.e. 4.5% of 10,000 dollars which equals 0.045 × 10,000 = 450 dollars a year. As the years pass, more and more will be put into the account due to interest.

Step 2; For there to be 13,500 dollars in the bank account we need to calculate how much money is added due to interest.

The money needed to be added through interest = 13,500 - 10,000 = 3,500 dollars.

So we need to determine how long it will take for the bank to add 3,500 dollars by adding 450 dollars a year.

The number of years to reach 13,500 dollars = $\frac{3,500}{450}$ = 7.777 years. By rounding this value to the nearest tenth, we get 7.8 years.

7 0

3 years ago