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Elena L [17]
3 years ago
14

10 more than twice a number. It is supposed to be a variable expression​

Mathematics
1 answer:
alexandr1967 [171]3 years ago
5 0
“10 more that” means “add 10 to something”

“twice” means “multiply something by 2”

Use “x” or another variable for “a number”

Twice a number: 2*x or 2x

10 more than twice a number: add 10 to 2x

Answer: 2x+10
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P varies directly with the square of R. When R is 4, P is 56. Find the value of P when R is 6
Sav [38]
Hey!
The formula of direct variation is y = kx. So we know that p = kr^2
Hint: after it says varies, it's basically the equal sign. 
so we can set it up
56 = 4^2k
56=16k
now we want k alone so we have to divide 16 on both sides
k=3.5
We can now solve for p like it asks
p = 3.5*6^2
p=126
There's your answer!
Hope this helps!
6 0
3 years ago
How do I solve this?<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3x%7D%7B8%7D%20%20-%201%20%3D%20%20%5Cfrac%7B5%7D%7B8%7D%
AURORKA [14]

To solve this problem, we first have to combine the two fractions on the left side of the equation.  To do this, we must make a common denominator of 8.  Because 8/8 is equal to 1, we can substitute this value into the equation:

3x/8 - 8/8 = 5/8

Next, we can subtract the fractions on the left side of the equation to simplify.  Remember that if fractions have the same denominator, we simply subtract their numerators and keep the difference over the common denominator.

3x - 8/8 = 5/8

Since both sides of the equation have a denominator of 8, we can cancel out this denominator on both sides by multiplying both sides by 8.  This gives us:

3x - 8 = 5

Next, we should add 8 to both sides of the equation so that we can get all of the constants to the right side of the equation.

3x = 13

Finally, we should divide both sides by 3 to get the variable alone on the left side of the equation.

x = 13/3

Therefore, your answer is x = 13/3.

Hope this helps!

7 0
3 years ago
Find the slope of the line passes through the points (1, -4) and (4,2)
nasty-shy [4]
For
(x1,y1) and (x2,y2)
slope=(y2-y1)/(x2-x1)

(1,-4)
(4,2)
x1=1
y1=-4
x2=4
y2=2

slope=(2-(-4))/(4-1)=(2+4)/3=6/3=2

slope=2
7 0
3 years ago
Factor the polynomial expression 4x3 - 4.
Sloan [31]
<h3>Answer:  4(x - 1)(x^2 + x + 1)</h3>

==================================================

Work Shown:

4x^3 - 4

4(x^3 - 1)

4(x - 1)(x^2 + x + 1)

In the last step, I used the difference of cubes factoring formula which is

a^3 - b^3 = (a - b)(a^2 + ab + b^2)

3 0
3 years ago
Jane has 3 ¾ cups of yogurt that she wants to split into smaller containers. Each container can hold ¾ cup of yogurt.
den301095 [7]

Answer:

5 containers

Step-by-step explanation:

Converting to a decimal can make questions like this easier to solve.

3 3/4 = 3.75

3/4= .75

3.75 cups divided by .75 cup containers results in 5 containers needed.

7 0
3 years ago
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