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babunello [35]
3 years ago
13

PLZZ HELP!!!!

Mathematics
1 answer:
Dominik [7]3 years ago
7 0
Its 72 because i did lenght*whith*hight and got 72
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I need help with #1 of this problem. It has writings on it because I just looked up the answer because I’m confused but I want t
belka [17]

In the figure below

1) Using the theorem of similar triangles (ΔBXY and ΔBAC),

\frac{BX}{BA}=\frac{BY}{BC}=\frac{XY}{AC}

Where

\begin{gathered} BX=4 \\ BA=5 \\ BY=6 \\ BC\text{ = x} \end{gathered}

Thus,

\begin{gathered} \frac{4}{5}=\frac{6}{x} \\ \text{cross}-\text{multiply} \\ 4\times x=6\times5 \\ 4x=30 \\ \text{divide both sides by the coefficient of x, which is 4} \\ \text{thus,} \\ \frac{4x}{4}=\frac{30}{4} \\ x=7.5 \end{gathered}

thus, BC = 7.5

2) BX = 9, BA = 15, BY = 15, YC = y

In the above diagram,

\begin{gathered} BC=BY+YC \\ \Rightarrow BC=15\text{ + y} \end{gathered}

Thus, from the theorem of similar triangles,

\begin{gathered} \frac{BX}{BA}=\frac{BY}{BC}=\frac{XY}{AC} \\ \frac{9}{15}=\frac{15}{15+y} \end{gathered}

solving for y, we have

\begin{gathered} \frac{9}{15}=\frac{15}{15+y} \\ \text{cross}-\text{multiply} \\ 9(15+y)=15(15) \\ \text{open brackets} \\ 135+9y=225 \\ \text{collect like terms} \\ 9y\text{ = 225}-135 \\ 9y=90 \\ \text{divide both sides by the coefficient of y, which is 9} \\ \text{thus,} \\ \frac{9y}{9}=\frac{90}{9} \\ \Rightarrow y=10 \end{gathered}

thus, YC = 10.

4 0
1 year ago
I need help with all of these
Olin [163]
If you take your calculator and enter in -82+28 it should give you the answer easily If you dont have one use ur phone.

Easiest way 1.o.1
6 0
4 years ago
Which of the following tables represents a function?<br> A. *|- 11 -5 -4 1
tekilochka [14]

Answer: Option A

Step-by-step explanation:

A relation between two variables x and y is considered a function if and only if, for each input value x there is only one output value y.

If for an input value x_0 there are two output values y_1 and y_2 then the relation is not a function.

Therefore, to answer this question, identify the table in which each value of x has only one value of y.

You may notice that the option that meets this requirement is option A

Note that in option B, there are two output values 17 and 16 for x = -4.

So this relationship is not a function.

In option C there are 2 output values for x = -5

In option D there are 2 output values for x = -11

7 0
3 years ago
Please help on this one!
tiny-mole [99]

We can usually get a couple of facts for these that let us rule out answers without working out all the details.

The green and red areas are below a CUP parabola, opening up.  CUP stands for concave up positive, and tells us there's a positive coefficient on x².  Unfortunately all the choices have a positive 1 coefficient, no help here.

Since the areas are below they're going to be y ≤ x² + other stuff.  That rules out B and C.  

The red and blue parts are below the line, and the line has a positive slope.  So that's y ≤ mx + b where m>0 is the positive slope.  That rules out D with the negative slope.


Answer: A


7 0
3 years ago
Please help me with his picture
Margaret [11]

Answer:

hi thas kwel

Step-by-step explanation:

7 0
3 years ago
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