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3 years ago

What is 3+9= free brainliest

Mathematics

2 answers:

kvv77 [185]3 years ago

7 0

Answer:

Step-by-step explanation:

dimulka [17.4K]3 years ago

5 0

Answer:

Step-by-step explanation:

I counted with my fingers

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Two or more points are what if they lie on the same line?

Maurinko [17]

Two lines are guaranteed to be coplanar if they: Lie in the same plane. Lie on the same line (are collinear) and Lie in the same plane. ... Collinear points are two or more points that lie on the same ____.

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3 years ago

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Joann works in a publicity office at the state university. she is paid $ 12.00 $12.00 an hour for the first 35 35 hours she work

hram777 [196]

$ 12 per hr for the first 35 hrs.....12 * 35 = 420

420 + 18x = 636
18x = 636 - 420
18x = 216
x = 216/18
x = 12

so she worked 35 hrs regular pay and 12 hrs overtime for a total of 47 hrs

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3 years ago

Help me plz Find the area of the circle use 3.14 for pi

Fed [463]

Answer:

530.93 cm thats what i got at least

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3 years ago

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A regular tube of toothpaste costs $2.50 for 3.2 ounces. A travel size tube costs $1.00 for 1.2 ounces. Compare the prices and w

Elanso [62]

Answer:

The regular size is more economical.

Step-by-step explanation:

Consider the provided information.

A regular tube of toothpaste costs $2.50 for 3.2 ounces.

Find out the unit rate as shown below:

$\frac{\$2.50}{3.2}=\$0.78$

Therefore, the cost of one ounce is $0.78.

A travel size tube costs $1.00 for 1.2 ounces.

Find out the unit rate as shown below:

$\frac{\$1}{1.2}=\$0.833$

Therefore, the cost of one ounce is $0.833.

From the above calculation we can observe that regular tube toothpaste price is better buy.

Now find the percent as shown:

Firs find the difference

$0.83-$0.78 = $0.05

Therefore,

$\frac{0.05}{0.78}\times 100\approx 6.41$

Hence, regular tube is 6.41% less costly as compare to travel size.

3 0

2 years ago

The domain and range of 5x squared plus 10x what is the domain and range of f of x equals 5x squared plus 10x

liberstina [14]

Answer:

Domain: set of all real numbers

Range: $y \geq -5$

Step-by-step explanation:

We have to find the domain and range of the function:

$f(x) =5x^2+10x$

This is a quadratic function, shape of a "U", that's called a parabola.

The domain is the set of x values for which the function is defined.

The range is the set of y values for which the function is defined.

Normally, any parabola in the form $ax^2+bx+c$ has domain as "all real numbers". This is the case for this problem as well, thus,

Domain = set of all real numbers

Now, for the range, we have to look at the minimum value of the function. So, the range would be y values greater than or equal to the minimum number. Lets find the minimum value of this function.

We have to find the value of x for which the minimum occurs by using the formula:

$x=\frac{-b}{2a} =\frac{-10}{2(5)} =-1$

Note: value of a is "5" and b is "10"

Now, we plug this into the function to find the minimum value:

$f(x)=5x^2+10x\\f(-1)=5(-1)^2 +10(-1)\\f(-1)=-5$

So, the range is set of all real numbers greater than or equal to -5.

8 0

3 years ago