The table above shows how long Mariana worked on homework each day of the week.
How many total minutes did Mariana work on homework during the week? Show your work.

Answer: 4.5%

Step-by-step explanation:

From the question, we are informed that Diego measured the length of a pen to be 22 cm while the actual length of the pen is 23 cm.

The percentage decrease in his measurement will be:

= (23 - 22)/22 × 100

= 1/22 × 100

= 4.5%

Answer:

4.3%

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

We add 4 on both sides

-1 + 4 < -4 + 4 + d

= 3 < d

Flip it and we get d > 3

The answer is A

Answer:

In her answer she has an equality, x=2. Emphasis on equal. However, in the original inequality it's not a equal sign. x=2 is true, just not the complete the answer.

Answer should be x is greater than or equal to 2.

Hopefully that makes sense.

Answer: Okay so let's try to find the amount of money needed to buy 1 lb. Therefore, let's divide the fraction by 14.

Then we'll divide both the numerator and denominator by 14.

÷

Then we simplify and get:

14÷14=1     2.99÷14=.2135   We can round that to .21

The unit rate for each pound would be 1:.21

I don't know if that helped, but yeah. :)

Step-by-step explanation:

Answer:

it is D

Step-by-step explanation:

Answer:

y=-4x-5

Step-by-step explanation:

Subtract 8x from both sides to get the y variable alone. Then divide both sides by 2 and get y=-4x-5.

Answer:

y=−4x−5 because the guy on top of me said so

Step-by-step explanation:

Answer:

1 hour = 1.7 miles / 1.5 hours = ? Miles

1.7 × 0.5 = 0.85 + 1.7 = 2.55 Miles

Step-by-step explanation:

1.7 × 0.5 = 0.85 + 1.7 = 2.55 Miles

Answer and explanation:

The expression P-2P+3P-4P cannot have the same values for different values of P. Let us illustrate this by substituting different values of P in the expression:

If P= 2

Substitute P=2 in the expression

2-2×2+3×2-4×2

=2-4+6-8

=-4

If P= 3

Substitute P=3 in the expression

3-2×3+3×3-4×3

=3-6+9-12

=-6

If P = 1

Substitute P=1 in the expression

1-2×1+3×1-4×1

= 1-2+3-4

= -2

If P = -2

Substitute P=1 in the expression

-2-2×-2+3×-2-4×-2

= -2+4-6+8

=4

Therefore we can see from the above that the expression has different values for different values of P

Answer:

2/3

4

3.

An airplane is flying from New York City to Los Angeles. The distance it travels in

miles, d, is related to the time in seconds, t, by the equation d = 0.15t.

d= 0.15

1

0.157

t

(seconds)

1

30

d

(miles)

0.15

0.15 x 1

0.15 x 30

12.75

a.

How fast is it flying? Be sure to include the units.

b.

How far will it travel in 30 seconds?

C.

How long will it take to go 12.75 miles?

4.

Crater Lake in Oregon is shaped like a circle with a diamet

Step-by-step explanation:

Answer: about 78 hours if you round up the answer!

Step-by-step explanation:

Answer:

Step-by-step explanation:

We will start with $249 and then add the inequality for h. Note that the number can be larger than 699, but not lower.

Answer:

41

Step-by-step explanation:

the answer is a:41

this is because 5 times 4 is 20 and 7 times 3 is 21

so 20+21 is 41

Answer:

6x⁴ + 20x³ - 30x² + 4

Step-by-step explanation:

Collect the like terms

6x⁴ + 18x³ + 2x³ - 36x² + 6x² + 12x - 12x + 4

SImplify expression

6x⁴ + 20x³ - 30x² + 4

Answer:

6x⁴- 18x³-4

i think

Step-by-step explanation:

Answer:

give brain list first

Step-by-step explanation:

Answer:

Isn't it simpler just to take the square root of 1,521?

It's 39

Step-by-step explanation:

Answer:

16 feet

Step-by-step explanation:

Set up a proportion where x is the height of the tree:

[tex]\frac{4}{5}[/tex] = [tex]\frac{x}{20}[/tex]

Cross multiply and solve for x:

5x = 80

x = 16

So, the tree is 16 feet tall

Answer:

The 30th sticker will have a sticker. The sticker will be 1 sticker (Kite Sticker) which will be put on the locker by Lin. This is because, following the arithematic progression of the sticker placement:

Locker 5 = Kite sticker

locker 10 = Kite sticker

Locker 15 = Kite sticker

.

.

Locker 30 = Kite sticker

It could be seen that at locker 30, the sticker to be placed by Lin will be Kite sticker

Step-by-step explanation:

Answer:

19%

Step-by-step explanation:

An exponential relationship is modeled by y = 31(0.81)^x , what is the percent rate of change for this function?

From the above exponential relationship given, we can see that this exponential relationship is an exponential decrease.

Where the formula:

y = a(1 - r)^t

Where a = Initial amount

r = rate of change in percent

t = time in years

y = a(1 - r)^x = y = 31(0.81)^x

1 - r = 0.81

r = 1 - 0.81

r = 0.19

Converting 0.19 × 100

= 19%

Answer:

Is there any answer choices?

Step-by-step explanation:

Answer:

answer choices??

Step-by-step explanation:

Answer:

The answer is C my good sir

Step-by-step explanation:

Answer:

She is able to paint 2/5's of the room in 1/2 hour. How long does it take to paint the whole room? = 7.5 minutes. Hence, it will take 5*7.5 = 37.5 minutes to paint the entire room.

Answer:

1 1/4 Hours

Step-by-step explanation:

2/5+2/5=4/5

4/5=1 hour

1/2/1/2=1/4

1/5 room in 1/4 hour

1+1/4=1 1/4 hours

Answer:

IT IS BOTH

Step-by-step explanation:

Given the coordinate of the triangle, P1P2P3, we are to classify the triangle. To do that we need to know the length of each side of the triangle

P1P2, P2P3 and P1P2 using the formula for calculating distance between two coordinates

D = √(x2-x1)²+(y2-y1)²

For P1P2;

P1=(−1,4) P2=(6,2)

P1P2 = √(6-(-1))²+(2-4)²

P1P2 = √7²+2²

P1P2 = √53

For P1P3;

P1=(−1,4) P3=(4,-5)

P1P3 = √(4-(-1))²+(-5-4)²

P1P3 = √5²+9²

P1P3 = √25+81

P1P3 = √106

For P2P3;

P2=(6,2) P3 = (4,-5)

P2P3= √(4-6)²+(-5-2)²

P2P3 = √2²+7²

P2P3 = √53

Since two sides of the triangles are the same, this means that it is an isosceles triangle.

Let's check whether it is right angled by applying Pythagoras theorem

(√53)²+(√53)² = x²

x is the longest side (hypotenuse)

53+53 = x²

106 = x²

x = √106

Since the square of the hypotenuse is equal to the sum of the sum of the square of other two sides, then it is also a RIGHT ANGLED TRIANGLE

Answer:

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

Explanation:

We're told that 4/9 kg of baking soda costs $2

We can form the equation

4/9 kg = 2 dollars

We want to know the cost of 1 kg of baking soda, so we'll need to divide both sides by 4/9 to turn the "4/9 kg" into "1 kg"

Therefore,

4/9 kg = 2 dollars

turns into

1 kg = (2 ÷ 4/9) dollars

We could simplify further, but your teacher has decided not to.

Step-by-step explanation:

Ok so i looked on an app i hope helps(Im not really sure if this is correct)I hope you get it soon!

Answer:

7x - 2y - 4 = 0

Step-by-step explanation:

from the perpendicular equation formula,

y/a + x/b = 1

x1 = 4

y1 = 12

a = -2

b= ?

Inserting the values into the above formula,

12/-2 + 4/b = 1

-6 + 4/b = 1

4/b = 7

b = 4/7

putting a and b into the original formula,

y/-2 + x/(4/7) = 1

-y/2 + 7x/4 = 1 (×4)

-2y + 7x = 4

7x - 2y - 4 = 0

Therefore, the equation of the line is;

7x - 2y - 4 = 0

Answer:

The worth of boat in 2013 will be $9202.6

Step-by-step explanation:

Rate of depreciation = 9% = 0.09

Cost of Boat in 2006 =$ 17,800

Cost of Boat in 2013 = ?

Years = 2013-2006= 7 years

The formula used is: [tex]\mathbf{A=P(1+r)^{t}}[/tex]

Since the value of boat is depreciating the value of r will be r=-0.09

Here P = 17,800 , r=-0.09 and t = 7 years Finding A

[tex]A=P(1+r)^{t}\\A=17,800(1+(-0.09))^7\\A=17,800(0.91)^7\\A=17,800(0.517)\\A=9202.6[/tex]

So, the worth of boat in 2013 will be $9202.6

Answer:

Step-by-step explanation:

2 / 3 ( 4x + 9 )

Distributive property

2 / 12x + 27