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3 years ago

5

A shelf is in the shape of a triangle. Find the angles of the triangle if the measures of the angle are in the ratio x:x:4x

1 answer:

user100 [1]3 years ago

8 0

First x equals 30
Second x equals 30 aswell
The last x equals 120

Asw: 30°, 30°, 120°

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A student bought 3 boxes of pencils and 2 boxes of pens for $6. He then bought 2 boxes of pencils and 4 boxes of pens for $8. Fi

Annette [7]

Let c and n represent the numbers of pencil and pen boxes, respectively
.. 3c +2n = 6.00
.. 2c +4n = 8.00

You can halve the second equation and subtract it from the first to get
.. (3c +2n) -(c +2n) = 6.00 -4.00
.. 2c = 2.00
.. c = 1.00

Then
.. 1.00 +2n = 4.00 . . . . . half the original second equation with c filled n
.. 2n = 3.00
.. n = 1.50

A box of pencils costs $1.00; a box of pens costs $1.50.

8 0

3 years ago

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10 – (8p + 3) = 9(2p - 5)

Eddi Din [679]

Answer:

p=2

Step-by-step explanation:

10 – (8p + 3) = 9(2p - 5)

(rearrange and distribute) -8+7=18−45

(Subtract and combine) −26=−52

(Divide and find p) p=2

6 0

2 years ago

Read 2 more answers

If Karri takes a 7 question true false test and guess on every question, what is the

dusya [7]

Answer:

The probability that she gets all 7 questions correct is 0.0078.

Step-by-step explanation:

We are given that Karri takes a 7 question true-false test and guess on every question.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,........$

where, n = number of samples (trials) taken = 7 question

r = number of success = all 7 questions correct

p = probability of success which in our question is probability that

question is correct, i.e. p = 50%

Let X = <u><em>Number of question that are correct</em></u>

So, X ~ Binom(n = 7, p = 0.50)

Now, the probability that she gets all 7 questions correct is given by = P(X = 7)

P(X = 7) = $\binom{7}{7} \times 0.50^{7} \times (1-0.50)^{7-7}$

= $1 \times 0.50^{7} \times 0.50^{0}$

= <u>0.0078</u>

6 0

3 years ago

Find all of the zeros

noname [10]

Answer:

{-3, -1, 1}

Step-by-step explanation:

Zeros refer to x-intercepts. X-intercepts are x values when y = 0. You can tell where they are by looking at where the line passes the x-axis.

Therefore, {-3, -1, 1} are the zeros.

3 0

3 years ago

The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls?

pentagon [3]

Total ratio=9+11=20
number of girls=11/20*400
=220

6 0

2 years ago

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