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3 years ago

Can someone plz answer number 10 and 11 don’t worry about number 12

Mathematics

2 answers:

Ipatiy [6.2K]3 years ago

8 0

Answer:

Step-by-step explanation:

No. I am not helping because you spam random "answers" to gain points for your account.<em> If you want to be taken seriously, take everyone else seriously.</em>

Artyom0805 [142]3 years ago

8 0

9514 1404 393

Answer:

10. x = 4

11. x = -5

Step-by-step explanation:

10. Use the perimeter formula. Collect terms, subtract* the constant, divide by the coefficient of the variable.

P = 2(L+W)

42 = 2(5x +(x-3))

21 = 6x -3 . . . . . . divide by 2, collect terms

24 = 6x . . . . . . . . add 3

4 = x . . . . . . . . . . divide by 6

11. Collect terms, subtract the constant, divide by the coefficient of the variable.

-8x -3(2x +1) = 67

-8x -6x -3 = 67 . . eliminate parentheses

-14x -3 = 67 . . . . . collect terms

-14x = 70 . . . . . . . add 3

x = -5 . . . . . . . . . . divide by -14

_____

* "Subtract" and "add the opposite" are the same mathematical operation. In both these problems, the constant we want to get rid of is -3, so we add 3 (the opposite of -3). Of course, that operation is done to both sides of the equation.

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What is the LCD of 10 and 15?

dem82 [27]

Answer:

The least common denominator, also called lowest common denominator (LCD), of 10 and 15 is 30.

Step-by-step explanation:

5 0

4 years ago

hree vertices of a rectangle are given. Find the coordinates of the fourth vertex. (–2, 4), (4, 0), (2, –3)

zhannawk [14.2K]

V1=(-2,4)=(x1,y1)→x1=-2, y1=4
V2=(4,0)=(x2,y2)→x2=4, y2=0
V3=(2,-3)=(x3,y3)→x3=2, y3=-3
V4=(x4,y4)→x4=?, y4=?

V1-V2
dx=x2-x1=4-(-2)=4+2→dx=6
dy=y2-y1=0-4→dy=-4

V4-V3
dx=x3-x4→6=2-x4
Solving for x4:
6=2-x4→6-2=2-x4-2→4=-x4→(-1)(4=-x4)→-4=x4→x4=-4

dy=y3-y4→-4=-3-y4
Solving for y4:
-4=-3-y4→-4+3=-3-y4+3→-1=-y4→(-1)(-1=-y4)→1=y4→y4=1

V4=(x4, y4)→V4=(-4, 1)

Answer: The coordinates of the fourth vertex are (-4,1)

5 0

3 years ago

The answer I don’t know how to do this promem

cupoosta [38]

Answer: if you show us the whole picture, maybe we will be able to solve it?

Step-by-step explanation:

just retake the picture so i can see the whole thing

8 0

3 years ago

Please solve!!! Bbkakakaj

sdas [7]

Answer:

B is the answer because yes

6 0

2 years ago

A young couple purchases their first new home in 2011 for $95,000. They sell it to move into a bigger home in 2018 for $105,00

mart [117]

Given:

The value of home in 2011 is $95,000.

The value of home in 2018 is $105,000.

To find:

The exponential model for the value of the home.

Solution:

The general exponential model is

$y=ab^x$ ...(i)

where, a is initial value and b is growth factor.

Let 2011 is initial year and x be the number of years after 2011.

So, initial value of home is 95,000, i.e., a=95,000.

Put a=95000 in (i).

$y=95000b^x$ ...(ii)

The value of home in 2018 is $105,000. It means the value of y is 105000 at x=7.

$105000=95000b^7$

$\dfrac{105000}{95000}=b^7$

$\dfrac{21}{19}=b^7$

Taking 7th root on both sides, we get

$\left(\dfrac{21}{19}\right)^{\frac{1}{7}}=b$

Put $b=\left(\dfrac{21}{19}\right)^{\frac{1}{7}}$ in (ii).

$y=95000\left(\left(\dfrac{21}{19}\right)^{\frac{1}{7}}\right)^x$

$y=95000\left(\dfrac{21}{19}\right)^{\frac{x}{7}}$

Therefore, the required exponential model for the value of home is $y=95000\left(\dfrac{21}{19}\right)^{\frac{x}{7}}$ , where x is the number of years after 2011.

5 0

3 years ago