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3 years ago

Please help I’m terrible at math

Mathematics

2 answers:

muminat3 years ago

7 0

Answer:

25.5 ft

Step-by-step explanation:

Starting level: 33 ft

Each day the water recedes 0.5 ft.

Now we calculate the number of ft the water recedes in 15 days.

15 days * 0.5 ft/day = 7.5 ft

In 15 days, the water recedes 7.5 ft.

Level of water after 15 days:

33 ft - 7.5 ft = 25.5 ft

Answer: 25.5 ft

chubhunter [2.5K]3 years ago

4 0

Answer:

25 1/2 feet

Step-by-step explanation:

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Seven and thirty twp hundreths plus two and one tenth times two and seven tenths minus 18a

alexdok [17]

Answer: Write the expression as:

" 70 $\frac{32}{100}$ +
2 $\frac{1}{10}$ * 2 $\frac{7}{10$ − 18a " ;
______________________________________________________
or; write as:
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" 70.32 + (2.1) * (2.7) − 18a " ;
______________________________________________________

To simplify:
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Using "PEDMAS" (the "order of operations") ;

the "multiplication" comes first;

So: → "(2.1) * (2.7) = 5.67 " .

And rewrite:
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" 70.32 + 5.67 − 18a " .

Now: " 70.32 + 5.67 = 75.99 " ;

So, we can the final simplified expression as:
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" 75.99 − 18a " ;

or; write as: " 75 $\frac{99}{100}$ − 18a " .
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7 0

3 years ago

Eight subtracted from 4 times a number is equal to 4 less than 6 times the number.

butalik [34]

$8-4 \cdot x=4-6\cdot x \\\\ 8-4x=4-6x \\\\ -4x+6x=4-8 \\\\ 2x=-4 \ \ \ |:2 \\\\ \boxed{x=-2}$

5 0

3 years ago

The ability to find a job after graduation is very important to GSU students as it is to the students at most colleges and unive

sergejj [24]

Answer:

Step-by-step explanation:

Using the formula

p +/- z* √(p(1-p) / n)

Where p is sample proportion = 3226/3957 = 0.8153, n = 3957 and z* is 2.576

0.8153 + (2.576 √(0.8153(1-0.8153) / 3957))

0.8153 + (2.576 √ (0.8153(0.1847) /3957)

0.8513 + (2.576 √(0.1572/3957)

0.8513 + (2.576 √0.00003974)

0.8513 + 2.576(0.0063)

0.8513 + 0.016

0.8670 ~ 87%

For the lower interview

0.8513 - 0.016

= 0.8353 ~ 84%

Thus, at 99% confidence interval is 84% and 87%

7 0

3 years ago

What is the final answer for 6x-6-7x=-13/2

olya-2409 [2.1K]

6x - 6 - 7x = -13/2

Multiply both sides by 2:
12x - 12 - 14x = -13

Simplify:
-2x - 12 = -13

Add 12 to both sides:
-2x = -1

Divide both sides by 2:
-x = -1

Change to a positive value of x:
x = 1

6 0

3 years ago

ALGEBRA HELP PLEASE

IrinaVladis [17]

Start by solving for x in the first problem:
3x=3+9y
x=1+3y
Then plug that into the second equation:
6(1+3y)-3y=-24
6+18y-3y=-24
15y=-30
y=-2
Then plug that back into first equation:
3x-9(-2)=3
3x+18=3
3x=-15
x=-5
Then I would check your answer by plugging those into both equations:
3(-5)-9(-2)=3
-15+18=3
3=3 CHECK
6(-5)-3(-2)=-24
-30+6=-24
-24=-24 CHECK

So the answer is x=-5 y=-2

4 0

4 years ago