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Basile [38]
3 years ago
5

Solve for x and tell how you got it (have to write work!)

Mathematics
2 answers:
icang [17]3 years ago
5 0
Well this is an isosceles triangle so there’s corresponding angles which mean the 45 degrees on the bottom also equals the one opposite from that. So 45+45=90..... And ofc a Triangle equals 180 (so 180-90= 90) so put the choices in place of 2x and u should get c 2x45=90 (I rlly hope this makes sense it’s kinda hard to explain!)
Paul [167]3 years ago
4 0
<h3>Hello there!</h3>

Let's look at the information given to us.

- The figure is a triangle

- One angle is 45 degrees

- The other two measure x and 2x

Now, what can we do with this information?

What is the sum of all the interior angles in a triangle? According to the angle sum theorem, it's 180 degrees.

Since you're given all interior angles in the triangle, you can write it out as:

x + 2x + 45 = 180

As x, 2x, and 45 are the interior angles.

Now, how can you solve this for x?

First, move all like terms to one side. In this case, move all numbers with x in it to one side, and all those without to the other, by doing the exact operation provided to both sides.

x + 2x + 45 - 45 = 180 - 45

x + 2x = 180 - 45

And now simplify.

3x = 135

/3     /3

x = 45

Therefore, your answer is x = 45.

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otez555 [7]
Three main methods come to mind: Substitution method, Elimination method, Matrix row-reduction.The first two methods are taught in early grades in most high schools. Matrix row-reduction is taught in senior years in high school, or more likely, in the early years of a university math or science program. 
8 0
3 years ago
Mark buys a wooden board that is 7 1/2 feet long. The cost of the board is $0.50 per foot, including tax. What is the total cost
artcher [175]

Answer:

Total cost of Mark's board is $3.75.

Step-by-step explanation:

We are given the following in the question:

Length of wooden board =

=7\dfrac{1}{2}\text{ foot}

Unit cost of board = $0.50 per foot

Total cost of board =

=\text{Length of board}\times \text{Unit cost of board}\\\\=7\dfrac{1}{2}\times 0.50\\\\=\dfrac{15}{2}\times \dfrac{1}{2}\\\\=\dfrac{15}{4} = 3.75\$

Thus, total cost of Mark's board is $3.75.

7 0
2 years ago
In a large population, 76% of the households have cable tv. A simple random sample of 225 households is to be contacted and the
notsponge [240]

0.017559

It is given that:

Probability of Households Having cable TV, p₀ = 76% = 0.76

Therefore,

The probability that the Households not having cable TV = 1 - 0.76 = 0.24

Sample size, n = 225 households

sample proportions is less than 82% i.e p = 0.82

Now,

The standard error, SE = \sqrt{} \frac{0.76(1-0.76)}{225}

= 0.02847

Z = \frac{0.82-0.76}{0.02847}

Z = 2.107

therefore, P(sample porportions < 0.82) = P(Z < 2.107)

now from the p value from the Z table we get P(sample porportions < 0.82) =  0.017559

To know more about standard deviations visit: brainly.com/question/475676

#SPJ4

3 0
1 year ago
I am having trouble solving this question. please give me a detailed and elaborate answer and also please attach the plotted gra
serious [3.7K]

Answer:

$ 2000

Step-by-step explanation:

Find the equation. You find the gradient by using the gradient formula (rise/run)

that would be

1600 - 800 over 40 - 20

800/20

m (gradient) = 40

Hence 40x ...

3 0
3 years ago
Read 2 more answers
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Pavlova-9 [17]

Answer:

The answer is just 4

Step-by-step explanation:

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▀█▌░░░▄░▀█▀░▀ ░░ Copy And Paste Him onto all of ur brainly answers

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8 0
3 years ago
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