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3 years ago

4. 5. 6. None of the choices are correct.

Mathematics

2 answers:

MariettaO [177]3 years ago

7 0

Answer:

A. 4

Step-by-step explanation:

Triangle ABD = Triangle BCD

Both hypotenuse are equal in length.

x + 2 = 3x - 6

x - 3x = -6-2

-2x = -8

x = 4

Step2247 [10]3 years ago

7 0

Hi !!

Find the value of x :

We have :

• x + 2

• 3x - 6

Match the values to find x :

x + 2 = 3x - 6

x - 3x = -6 - 2

-2x = -8

x = 8/2

x = 4

* 4 + 2 = 3(4) - 6

6 = 12 - 6

6 = 6

Equality is checked, it is an isosceles triangle

Both the correct value is 4.

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3 years ago

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4 years ago

Help! Need by 10:30 to turn in and I'm confused!

Alecsey [184]

Answer:

8 boxes of tissues

5 bags of cough drops

Step-by-step explanation:

You need to write a system of equations.

x = number of tissue boxes

y = number of cough drop bags

x (number of tissue boxes) + y (number of cough drop bags) = 13 (total number of tissues and cough drops combined.

So, your first equation is

x + y = 13

Then, you need to write the second equation.

(1.69 [cost of 1 tissue box] * [number of tissue boxes]) + (1.19 [cost of one bag of cough drops] * [number of cough drop bags] = 19.47 [total cost of tissues and cough drops]

That's a lot to read, so here's the equation simplified!

1.69x + 1.19y = 19.47

Now, you have two equations:

x + y = 13

1.69x + 1.19y = 19.47

I would solve with the substitution method.

the first equation can be changed to x = 13 - y by subtracting y from both sides.

Then, your two equations are:

x = 13 - y

1.69x + 1.19y = 19.47

Now, you can plug in that value of x into the second equation!

1.69(13 - y) + 1.19y = 19.47

21.97 - 1.69y + 1.19y = 19.47

subtract 21.97 from both sides

-1.69y + 1.19y = -2.5

Add the y values

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divide both sides by -0.5

so, y equals 5 bags of cough drops

now that you know what y equals, plug it back into your original equation to find x!

x + y = 13

plug in y

x + 5 = 13

x = 8

so, x = 8 boxes of tissues

Hope this helps! Let me know if you have any questions!

8 0

3 years ago