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maria [59]
2 years ago
6

During the summer months the water level in Marta's pool decreases by about 1/2 inch each day due to evaporation. Which equation

shows the total change, in inches, to the water level in her pool after 30 summer days?
Mathematics
1 answer:
larisa86 [58]2 years ago
8 0

Answer:

Change = -(1/2) * 30 = -15 inches

Step-by-step explanation:

If the water level decreases by 1/2 inch each day, the change in the water level in one day is -1/2 inch.

So, after t days, the total change in the water level can be calculated as:

Total change = -(1/2) * t inches

So, after 30 summer days, the total change is:

Change = -(1/2) * 30 = -15 inches

So the water level of the pool after 30 summer days has decreased by 15 inches.

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What is the value of x? Enter your answer as a decimal to the nearest tenth in the box.
gogolik [260]

ANSWER

23.6 feet

EXPLANATION

The given triangle is a right triangle.

The hypotenuse is 27 ft.

The given angle I s 29°

The unknown side x, is adjacent to the given angle.

We use the cosine ratio to get,

\cos(29 \degree)  =  \frac{adjacent}{hypotenuse}

\cos(29 \degree)  =  \frac{x}{27}

We multiply both sides by 27 to get;

x = 27\cos(29 \degree)

x = 23.6ft

to the nearest tenth.

7 0
1 year ago
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Alvin and Bala has 26 stickers.Alvin had 8 more stickers thab Bala.How many stickers did Bala have?​
Brilliant_brown [7]
Bala had 9 stickers

You could set this up as a equation. Because there was a total of 26 you would for sure put =26. Next you are told Alvin has 8 MORE than Bali, therefore you would be adding the unknown value of Bala by 8. This could be represented as x+8=26. Now that you have x added to 8 you need to add another x to the equation to fully represent the problem since Alvin has 8 more stickers than Bala does. The new equation would become 2x+8=26.

You must now isolate x by first subtraction 8 from both sides which will leave you with 2x=18. Then you divide on both sides by 2 and will leave you with x=9
3 0
2 years ago
Sharon wants to make key chains with different colored beads. Each key chain will look the same. Sharon will use a total of 20 g
skelet666 [1.2K]
20 green and 20 red ?
8 0
2 years ago
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3 lines are shown. A line with points M, H, K intersects with a line with points J, H, L at point H. Another line extends from p
otez555 [7]

Answer:

Option B.

Step-by-step explanation:

Given information: ∠MHL=(3x+20), ∠KHN=(x+25), and ∠JHN=(x+20).

We need to find the measure of ∠JHN.

\angle MHL=\angle JHK                         (Vertical opposite angles)

\angle MHL=\angle JHN+\angle KHN

Substitute the given values.

3x+20=(x+20)+(x+25)

3x+20=2x+45

3x-2x=45-20

x=25

The value of x is 25. So, the measure of ∠JHN is

\angle JHN=x+20=25+20=45

The measure of ∠JHN is 45°.

Therefore, the correct option is B.

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2 years ago
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What is the sum of all positive integers smaller than $1000$ that can be written in the form $100\cdot 2^n$, where $n$ is an int
netineya [11]

Answer:

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Step-by-step explanation:

Consider the provided information.

It is given that positive integers smaller than 1000 and that can be written in the form 100\cdot 2^n

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For n = 0

100\cdot 2^{0}=100

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100\cdot2^3 = 800

For n=4 the obtained number is greater than 1000.

Now add all the numbers.

100+50+25+200+400+800=1575

Hence, the sum is 1575.

6 0
1 year ago
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