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3 years ago

Please help me! i don't know how to work this out.

Mathematics

1 answer:

crimeas [40]3 years ago

6 0

Answer:

21, 24, 29

Step-by-step explanation:

The first term is when n = 1.

(1)² + 20 = 21

The second term is when n = 2.

(2)² + 20 = 24

The third term is when n = 3.

(3)² + 20 = 29

To find how many terms are less than 50, set n² + 20 equal to 50 and solve for n:

n² + 20 = 50

n² = 30

n ≈ 5.477

Rounding down, n = 5 is the last term that is less than 50.

Therefore, there are 5 terms in the sequence that are less than 50.

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Find a quadratic model for the set of values: (-2, -20), (0, -4), (4, -20). Show your work.

Ivahew [28]

Ok... so this question can be solved by using simultaneous equations.

Use the general from of a parabola

$y = ax^2 + bx + c$

you know the value of c, the y-intercept... y = -4

which means the equation is

$y = ax^2 + bx - 4$

now use the other 2 points to get 2 equations in 2 unknowns

(-2, -20) just substitute

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this becomes

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3 years ago

HELPPP NEED IN THE NEXT 10 MINSSS!!!!

Mice21 [21]

Answer:

15.6

Step-by-step explanation:

the traingle is right so u have to apply the pythagorean theorem to find x so x^2=10^2+12^2=244

so x=15.6

6 0

2 years ago

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Calculate the distance between each given pair of points. Round your answer to the nearest tenth, if necessary.

Ksju [112]

The answer is 5

Here are the steps:

First off, we will be using the distance formula of
$d=\sqrt{(x_ {2}- x_{2}) ^{2}+( y_{2}- y_{1})^2 }$

So we have the ordered pairs of (3,1) and (6,5)

Once you plug them into the formula it should look like this:
$d= \sqrt{(6-3)^2+(5-1)^2}$

Now we do the math inside the parenthesis and end up with:
$d=\sqrt{3^2+4^2}$

Then you multiply by the power and simplify to get:
$d=\sqrt{25}$

And the $\sqrt{25}$ =5

So your answer is 5

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3 years ago

Oliver needs to save at least $1500 to buy a computer. He has already saved $650. How much more does he need to save? Write and

Misha Larkins [42]

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3 years ago

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ozzi

Hello,
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y-3=4/5(x+1)
==>y=4/5 *x +19/5

3 0

3 years ago