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3 years ago

Someone pls help ive been stuck for forever

Mathematics

1 answer:

shepuryov [24]3 years ago

4 0

This is a triangle. The interior angles of a triangle always add up to 180 degrees. Thus, write an equation representing the sum of the given angles, with "180 degrees" on the right side.

4x-1 + 8x+2 + 71 = 180 degrees.

Solve for x!

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IrinaK [193]

D, it makes the most sense

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2 years ago

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Find 2 consecutive even intergers such that the smaller added to two times the larger gives a sum of 34

charle [14.2K]

The two consecutive integers would be 10 and 12. Not 100% sure though.

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3 years ago

Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviati

Liula [17]

Solution: We are given:

$Range =2.76$

$Standard-deviation=0.807$

Now let's find the estimated value of standard deviation using the range rule of thumb. According to range rule of thumb, the estimate of standard deviation is:

$S\approx \frac{2.76}{4}= 0.690$

Therefore the estimated standard deviation is 0.690

is this an acceptable approximation?

Answer: c. Yes, because the error of the range rule of thumb's approximation is less than 15%.

Explanation:

The difference between estimated standard deviation and actual standard deviation is:

0.807 - 0.690 = 0.117

Now let's find the percentage of error

$\frac{0.117}{0.807} \times 100= 14.50\%$ .

Therefore, the error of the range rule of thumb's approximation is less than 15%.

4 0

3 years ago

Compute the product AB by the definition of the product ofmatrices, where Ab1 and Ab2 are computed separately, and by therow-

nasty-shy [4]

Answer:

$A * B = \left[\begin{array}{ccc}10&-6\\8&5\\19&-10\end{array}\right]$

Step-by-step explanation:

Given

$A =\left[\begin{array}{cc}2&-2\\3&4\\4&-3\end{array}\right]$

$B = \left[\begin{array}{cc}4&-1\\-1&2\end{array}\right]$

Required

$AB$

To do this, we simply multiply the rows of A by the column of B;

So, we have:

$A * B = \left[\begin{array}{ccc}2*4 + -2*-1&2*-1+-2*2\\3*4+4*-1&3*-1+4*2\\4*4-3*-1&4*-1-3*2\end{array}\right]$

$A * B = \left[\begin{array}{ccc}10&-6\\8&5\\19&-10\end{array}\right]$

6 0

2 years ago

You roll a six-sided number cube. what is the probability that you will roll a two?

Nataliya [291]

Hello there,

Since there are 6 sides to one cube and 6 choices to choose from there is a 1/6 chance of rolling a 2.

Answer: 1/6

Hope this helps!

7 0

3 years ago