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3 years ago

Which planet in the chart is most likely Earth? Yeah Does somone no the answer

Mathematics

1 answer:

pishuonlain [190]3 years ago

5 0

Answer:

Kepler-452b has a probable mass five times that of Earth, and its surface gravity is nearly twice as Earth's, though calculations of mass for exoplanets are only rough estimates. If it is a terrestrial planet, it is most likely a super-Earth with many active volcanoes due to its higher mass and density.Step-by-step explanation:

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The regular price of an item at a store is p dollars. The item is on sale for 20% off the regular price. Some of the expressions

ruslelena [56]

Answer:

Expression B: 0.8p

Expression D: p - 0.2p

Step-by-step explanation:

The regular price of an item at a store is p dollars. The item is on sale for 20% off the regular price. Some of the expressions shown below represent the sale price, in dollars, of the item.

Expression A: 0.2p

Expression B: 0.8p

Expression C:1 - 0.2p

Expression D: p - 0.2p

Expression E: p - 0.8p

Which two expressions each represent the sale price of the item?

Regular price of the item = $p

Sale price = 20% off regular price

Sale price = $p - 20% of p

= p - 20/100 * p

= p - 0.2 * p

= p - 0.2p

= p(1 - 0.2)

= p(0.8)

= 0.8p

The sale price is represented by the following expressions

Expression B: 0.8p

Expression D: p - 0.2p

3 0

3 years ago

What is 87 24/25 in decimals step by step

JulijaS [17]

<span>87 24/25 ...this is a mixed fraction ..so in order to get in in decimal we first need to convert it into unlike fraction ..for that we do the following ...
</span>
<span>87 24/25
</span>=> multiply the whole number and the denominator ..
=>87 X 25 = 2175
=>now add the numerator to this product ...
=>2175 + 24 = 2199 ..
=> so now we get an unlike fraction which when we divide we get the answer in decimals ..
=> 2199/25 = 87.96 ...
that is ... 87 24/25 in decimals ...

Hope it helps !!!

5 0

3 years ago

Read 2 more answers

Mandy was solving a math equation.

NNADVOKAT [17]

Answer:

No, because when there is a + in front of an expression parentheses, the expression remains the same

Step-by-step explanation:

-85+(-40)

= -85-50

= -125

7 0

3 years ago

With slope –1/4, passing through (-4, -1)

True [87]

Answer:

$y = -\frac{1}{4}x - 2$

Step-by-step explanation:

i'm not sure if you're trying to find the equation of the line ?? but i'll assume that's the case and find the slope-intercept form equation of the line.

slope intercept form is $y = mx + b$ , where $m$ is the slope and $b$ is the y-intercept. since the slope is already identified, you can plug in $-\frac{1}{4}$ for $m$ .

$y = mx + b$ ⇒ $y = -\frac{1}{4}x+b$

plug in the $x$ and $y$ values from the coordinate pair that passes through the line, which is (-4, -1). you can start with either $x$ or $y$ , but i'm going to start with $x$ .

first, plug in $-4$ for $x$ .

$y = -\frac{1}{4}x+b$ ⇒ $y = -\frac{1}{4}(-4)+b$

now plug in $-1$ for $y$ .

$y = -\frac{1}{4}(-4)+b$ ⇒ $-1 = -\frac{1}{4}(-4)+b$

after plugging in all of the given values, the equation is now $-1 = -\frac{1}{4}(-4)+b$ , in which you need to solve for $b$ .

now it's time to solve! begin by multiplying $-\frac{1}{4}(-4)$ in order to simplify the right side of the equation.

$-\frac{1}{4}(-4) = 1$

you now have $-1 = 1 + b$ . subtract 1 from both sides of the equation. on the right side, it cancels itself out, leaving you with $b$ . on the left side of the equation, you now have $-1 - 1$ , which equals $-2$ .

therefore $-2 = b$ , or $b = -2$ .

now that you've solved for your $b$ value, plug it into your initial slope-intercept form equation!

$y = -\frac{1}{4}x + b$ ⇒ $y = -\frac{1}{4}x - 2$

if you want to check to make sure that the values are correct, plug (-4, -1) into your completed slope-intercept form equation. as you did in the beginning, plug in $-4$ for $x$ and $-1$ for $y$ .

$y = -\frac{1}{4}x - 2$ ⇒ $-1 = -\frac{1}{4}(-4) - 2$

begin simplifying by multiplying $-\frac{1}{4}(-4)$ .

$-1 = -\frac{1}{4}(-4) - 2$ ⇒ $-1 = 1 - 2$

subtract $1 - 2$ .

$-1 = 1 - 2$ ⇒ $-1 = -1$

since both sides of the equation are equal, that means your $b$ value of $-2$ is correct because it makes the equation true!

aaaand there you go! i hope this helps. have a great day! <3

8 0

3 years ago

Johnson buys a package of three oranges for $2 and sells a package of two oranges for $3. If joshua wants to make a profit of $5

Yanka [14]

He buys a pack of 3 oranges for $2....2/3 = 0.67...thats 67 cents per orange
he sells a pack of 2 oranges for $3....3/2 = 1.50...thats 1.50 per orange

so if he buys it for 0.67 and sells it for 1.50....1.50 - 0.67 = 0.83....he makes a profit of 0.83 cents per orange

0.83x = 50
x = 50/0.83
x = 60.24....he would have to sell 61 <==

check...
0.83(61) = 50.63
and u see, if he sold 60....0.83(60) = 49.80...he wouldn't quite make the profit of 50.

4 0

3 years ago