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3 years ago

Y=x + 4 and 2y = -2x - 8

Mathematics

1 answer:

Sphinxa [80]3 years ago

5 0

Socratic is a really good app for these type of questions! I definitely recommend. For science too!

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What kind of property is this problem 3x(k+4)=3xk+12

ser-zykov [4K]

If i'm not wrong its distributing property of addition.

4 0

3 years ago

A DVD player that normally cost $160 is on sale for 70% of its normal price.What is the sale price of the DVD player.

maw [93]

160 $ = 100%
x $ = 70%

100 x = 11200
x = 112

160,00 - 112,00 = 48,00$

7 0

3 years ago

Find the range, median, mean, and mode 53,68,6,81,23,6,57,77,57,42,57,81,68

zimovet [89]

Answer:

Population size: 13

Median: 57

Minimum: 6

Maximum: 81

First quartile: 32.5

Third quartile: 72.5

Interquartile Range: 40

Outliers: none

4 0

3 years ago

Sec squared 55 - tan squared 55

sergejj [24]

Answer:

sec squared 55 – tan squared 55 = 1

Explanation:

Given, sec square 55 – tan squared 55

We know that,

$\sec \Theta=\frac{\text {hypotenuse}}{\text {base}}$

And,

$\tan \theta=\frac{\text { perpendicular }}{\text { base }}$

where Ө is the angle

Substituting the values

$\left(\frac{\text {hypotenuse}}{\text {base}}\right)^{2}-\left(\frac{\text { perpendicular }}{\text {base}}\right)^{2}$

Solving,

$\frac{(\text {hypotenuse})^{2}-(\text {perpendicular})^{2}}{(\text {base}) *(\text {base})}$

According to Pythagoras theorem,

$\text { (hypotenuse) }^{2}-\text { (perpendicular) }^{2}=(\text { base })^{2}$

Putting this in the equation;

squared 55 - tan squared 55 =

$\frac{(\text {hypotenuse})^{2}-(\text {perpendicular})^{2}}{(\text {base}) *(\text {base})}=\frac{(\text {base})^{2}}{(\text {base}) *(\text {base})}=1$

Therefore, sec squared 55 – tan squared 55 = 1

6 0

3 years ago

10. In what year would you expect 5% of the U.S. population to smoke cigarettes?

MissTica

Sadly, 14% of US smokes that’s just adult

6 0

2 years ago