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3 years ago

Kylie wrote the expression. (9+k)=5. what is the value of kylies expression for k=4

Mathematics

1 answer:

Fynjy0 [20]3 years ago

8 0

I thought it was -4 I calculated it and that’s what I got?¿

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If M is the midpoint of XY, find the coordinates of X if M(-3,-1) and Y(-8,6)

vova2212 [387]

$\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
X&({{ a}}\quad ,&{{ b}})\quad 
% (c,d)
Y&({{ -8}}\quad ,&{{ 6}})
\end{array}\qquad
% coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)$

$\bf \left( \cfrac{-8+a}{2}~,~\cfrac{6+b}{2} \right)=\stackrel{M}{(-3,-1)}\implies 
\begin{cases}
\cfrac{-8+a}{2}=-3\\\\
-8+a=-6\\
\boxed{a=2}\\
----------\\
\cfrac{6+b}{2}=-1\\\\
6+b=-2\\
\boxed{b=-8}
\end{cases}$

5 0

3 years ago

Factor completely. x2−5x−36 Enter your answer in the box.

Kamila [148]

Answer:

(x - 9)(x + 4)

Step-by-step explanation:

x^2−5x−36

As you know, -36 = -9 * 4 and (-9) + 4 = -5

so Factor

= (x - 9)(x + 4)

4 0

2 years ago

Read 2 more answers

I forgot how to do this, can sm1 solve it?

STatiana [176]

Answer:

See below.

Step-by-step explanation:

Polly has the least. Let's work this from least to greatest.

They have £270. They share it together. Polly has £30. Andy has £60, and Phoebe has £180.

180 + 60 = 240.

240 + 30 = 270.

Pho: £180

Andy: £60

Polly: £30.

hope this helps.

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2 years ago

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Why is 1.71x10^7 written in standard form

Elan Coil [88]

Answer:5.00 + .60 + .07 that is your answer

Step-by-step explanation:

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3 years ago

When changing a percent to the equivalent decimal you drop the percent sign and then

katrin2010 [14]

Move the decimal to the left twice.

35%

35.0

.35

(this is the equivalent of dividing the number by 100)

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3 years ago