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2 years ago

PLease explain this to me

Mathematics

1 answer:

aliina [53]2 years ago

7 0

Answer:

ok so brainly is a place where you ask questions :P

<em>hope this helps<3</em>

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EF is a median of trapezoid ABCD. If the length of AB is 8x, and the length of CD is 20x, what is the length of EF in terms of x

grin007 [14]

To answer your question, the length of EF in terms of x is 14x. I am hoping that this answer has satisfied your query and it will be able to help you, and if you would like, feel free to ask another question.

8 0

3 years ago

Need help finding equation

Elden [556K]

Answer:

Step-by-step explanation:

Based on the two graphs I see at the bottom of the photo, you're looking at a quadratic function. The answer you put in is a linear equation.

Quadratic functions follow the form $ax^2+bx+c$ , where a, b, and c can be either positive or negative constants.

The table says that the equation, when graphed, should start at the top, slide to the bottom, and then slide back up to the top. So a must be positive.

c has to be -8 since it's the y-intercept.

So far, our equation is $ax^2+bx-8$ . We'll need to plug in some points in order to work out what $a$ and $b$ are.

Let's use $(-2,5)$ as the first set of points, and $(4,14)$ as the second set.

$5=a(-2)^2+b(-2)-8\\14=a(4)^2+b(4)-8\\$

Now we have 2 equations with 2 unknowns. Solve for one variable:

$5=4a-2b-8\\13+2b=4a\\\frac{13+2b}{4}=a$

Now substitute that into the second equation:

$14=(\frac{13+2b}{4})(4^2)+4b-8\\14+8=(13+2b)(4)+4b\\22-52=8b+4b\\-30=12b\\-\frac{30}{12}=-\frac{10}{4}=-\frac{5}{2}=b$

Now substitute the result into the first equation.

$\frac{13+2(-\frac{5}{2})}{4}=a\\\\\frac{13-5}{4}=a\\\\\frac{8}{4}=a\\\\ 2=a$

Now substitute our values back into the original equation:

$y(x)=2x^2-\frac{5}{2}x-8$

Please let me know if this is correct.

8 0

3 years ago

Solve 5(2x + 4) = 15. Round to the nearest thousandth.<br> PS: x+4 is the power for 2

lilavasa [31]

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

Let's solve for x ~

$\qquad \sf \dashrightarrow \: 5(2x + 4) = 15$

$\qquad \sf \dashrightarrow \: (5 \times 2x) + (5 \times 4) = 15$

$\qquad \sf \dashrightarrow \: 10x + 20 = 15$

$\qquad \sf \dashrightarrow \: 10x + 20 - 20 = 15 - 20$

$\qquad \sf \dashrightarrow \: 10x = - 5$

$\qquad \sf \dashrightarrow \: \dfrac{10x}{10} = \dfrac{ - 5}{10}$

$\qquad \sf \dashrightarrow \: x = - \dfrac{ 1}{2}$

hence value of x is - 1/2

3 0

2 years ago

PLEASE HELP ME! WILL GIVE BRAINLIEST

Digiron [165]

well Y is the amount of water so Y is 600,000 and X is amount of time so it should say something like 600,000x meaning 600,000 water in x minutes. answer is B i think

3 0

3 years ago

Read 2 more answers

here are the prices of 5 new bicycles in dollars 25,30,50,77,80. The standard deviation is about $26.If a 6th bike is added to t

Anastaziya [24]

Answer:

The new standard deviation will be greater than $26

Step-by-step explanation:

The new bicycle has a price much larger than the price of the others. In fact it is almost double the price of the other bicycles. It causes a large increase as a result. Also, I took the quiz.

6 0

3 years ago