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3 years ago

What is the answer for K ?

Mathematics

2 answers:

Norma-Jean [14]3 years ago

7 0

10/3 = k/9

10 x 9 = 3 x k

90 = 3 k

k = 90/3

k = 30

Luda [366]3 years ago

5 0

You need to do a cross multiple first and then we’ll get 3K=90 so they just want K so 90/3 and the answer is 30

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Can someone please help me figure out how to solve for x?

Anna007 [38]

Answer:

$x=30$

Step-by-step explanation:

Both triangles in this figure are similar. Therefore, we can set up the following proportion:

$\frac{21}{x}=\frac{14}{20}$ .

Cross-multiply to solve:

$14x=21\cdot 20,\\x=\frac{21\cdot20}{14},\\x=\fbox{$30$}$ .

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3 years ago

Morten Andersen played in NFL for 25 years write and solve an equation to find how many points he averaged each year

soldi70 [24.7K]

Answer:

$r =\frac{2437points}{25 years} =97.45 \frac{points}{year}$

So then we have that Morten Andersen scored on average 97.45 points per year in his career.

Step-by-step explanation:

Assuming the following table on the figure attached.

We see that the career points for Morten Andersen was 2437. That include all the points over alll the years the he played in the NFL.

Since the total years played by Morten Andersen was 25 we can write the following equation:

$25 r =2437$

Where $r$ represent the rate of points average per year.

If we solve for r from the last equation we can divide both sides of the equation and we got:

$r =\frac{2437points}{25 years} =97.45 \frac{points}{year}$

So then we have that Morten Andersen scored on average 97.45 points per year in his career.

4 0

3 years ago

HELP!! 4. (01.02 MC) Which number line shows the solution to -3- (-1)? (1 point) o

statuscvo [17]

Answer:

The third choice gives the correct sequence.

Step-by-step explanation:

The Number Line

To represent numbers in the line, we use arrows starting from the mark for zero up to the given number. If the number is positive, the arrow points to the right and if the number is negative, the arrow points to the left.

The number -3 must be represented as an arrow to the left side of length 3. Subtracting something from the number should also point to the left side, but if the number is negative, then the new arrow points to the right side.

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The third choice gives the correct sequence.

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3 years ago

On Martin's first stroke, his golf ball traveled 4/5 of the distance to the hole. On his second stroke, the ball traveled 79 met

Sav [38]

Answer:

0.395 kilometre

Step-by-step explanation:

Given:

On Martin's first stroke, his golf ball traveled 4/5 of the distance to the hole.

On his second stroke, the ball traveled 79 meters and went into the hole.

Question asked:

How many kilometres from the hole was Martin when he started?

Solution:

Let distance from Martin starting point to the hole in meters = $x$

On Martin's first stroke, ball traveled = $\frac{4}{5} \ of \ total \ distance\ to\ the\ hole$

$=\frac{4}{5} \times x=\frac{4x}{5}$

On his second stroke, the ball traveled and went to the hole = 79 meters

Total distance from starting point to the hole = Ball traveled from first stroke + Ball traveled from second stroke

$x=\frac{4x}{5} +79\\ \\ Subtracting\ both\ sides\ by \ \frac{4x}{5}\\ \\ x- \frac{4x}{5}= \frac{4x}{5}- \frac{4x}{5}+79\\ \\ \frac{5x-4x}{5} =79\\ \\ By \ cross\ multiplication\\ \\ x=79\times5\\ \\ x=395\ meters$