how many solutions does this system of equations have ? PLZ HELP ASAP DUE AFTER CLASS !

Answer:

The first one is correct

The second one is 20years

The third one is £8820

Step-by-step explanation:

Answer:

The volume of the cone is approximately 453.0 cm³

Step-by-step explanation:

The volume of a cone is one third that of a cylinder with the same height and radius.  That gives us  1/3 πr²h, where r is radius and h is height.

However, we are not given the height of the cone, but the side length.  We can work out the height using the Pythagorean theorem, as we have a right triangle with the height, base radius, and length.  You may recall that the Pythagorean theorem states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of it's other two sides:

[tex]a^2 = b^2 + c^2[/tex]

So we can find the height of the cone with that:

[tex]10.8^2 = 7.4^2 + h^2\\h^2 = 10.8^2 - 7.4^2\\h^2 = 116.64 - 54.76\\h^2 = 61.88\\h = \sqrt{61.88}\\h \approx 7.9[/tex]

Now that we have the cone's height, we can solve for its volume:

[tex]v = \frac{1}{3} \pi r^2 h\\v = \frac{1}{3} \pi \times 7.4^2 \times 7.9\\v = \frac{1}{3} \pi \times 54.76 \times 7.9\\v = \frac{1}{3} \pi \times 432.6\\v = \pi \times 144.2\\v \approx 453.0 cm^3[/tex]

Answer:

c = 490/3

Step-by-step explanation:

Answer:

D and B

Step-by-step explanation:

Answer:

.64%

Step-by-step explanation:

16 devided by 25=.64

Answer:

14/15÷3/5 =1 5/9

Step-by-step explanation:

14/15÷3/5=?

Dividing two fractions is the same as multiplying the first fraction by the reciprocal (inverse) of the second fraction.

Take the reciprocal of the second fraction by flipping the numerator and denominator and changing the operation to multiplication. Then the equation becomes

14/15×5/3=?

For fraction multiplication, multiply the numerators and then multiply the denominators to get

14×5 15×3=7045

This fraction can be reduced by dividing both the numerator and denominator by the Greatest Common Factor of 70 and 45 using

GCF(70,45) = 5

70÷5 45÷5=14/9

The fraction

14/9

is the same as

14÷9

Convert to a mixed number using

long division for 14 ÷ 9 = 1R5, so

14/9=1 5/9

Therefore:

14/15÷3/5=1 5/9

Please mark brainliest

Step-by-step explanation:

Result:

1.5 - 1 1/5 = 3/10 = 0.3

Spelled result in words is three tenths. 

How do you solve fractions step by step?

Conversion a decimal number to a fraction: 1.5 = 15/10 = 3/2

a) Write down the decimal 1.5 divided by 1: 1.5 = 1.5/1

b) Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.)

1.5/1 = 15/10

Note: 15/10 is called a decimal fraction.

c) Simplify and reduce the fraction

15/10 = 3 * 5/2 * 5 = 3 * 5/2 * 5 = 3/2

Conversion a mixed number 11/5 to a improper fraction: 1 1/5 = 1 1/5 = 1 · 5 + 1/5 = 5 + 1/5= 6/5

Answer: b

Step-by-step explanation:

The correct statment is the amount spent to manufacture each radio.

An equation is an expression that shows the relationship between two or more numbers and variables.

We have given that the cost of manufacturing the radios is;

c(r) = 5.25r + 125

where, r is the number of radios

This is a linear function and the general form of a linear function as;

f(x) = mx + b

Here m represents the slope of the function or the rate of change of the function while b represents the intercept of the initial value of the function.

From the given function we have;

m = 5.25

b = 125

Which means that 5.25 represents the rate of change of the function. It mean the value by which the value of r changes the function.

In other words,the correct statment is the amount spent to manufacture each radio.

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Answer:

The Markup was by 25%

Step-by-step explanation:

The answer is 25% because 25% of 64 is 16

25% * 64 = 16

64 + 16 = 80

So, the price markup was by 25%

Hope this helps! :)

Answer:

its c and you're welcome

Step-by-step explanation:

Answer:

1x+3y=35, 2x+y=20

x=5, y=10

Step-by-step explanation:

Let x equal the number of hats and y equal number of shirts.

Solve by substitution, elimination, or graphing.

Personally, I just solved by substitution.

Solve for x (or y) in the first equation. Let's do x.

1x+3y=35 goes to 1x=35-3y or just x=35-3y.

Since we have x, plug it in the other equation. 2(35-3y)+y=20. This equals out to y=10, i assume you understand the algebra.

Plug 10 into either equation for y.

1x+3(10)=35 or x+30=35. subtract 30 on each side. X=5.

Not entirely sure, but I didn't get 1 as my result when I did this question. I got false as my answer, but as I cannot provide proof, I hope somebody more qualified answers this for you!

Answer:

It is false.

Step-by-step explanation:

Neither of the systems of equations will be equal if you use this x and y.

Answer:

The first plant produces 3x+20 more items daily than the second plant.

Step-by-step explanation:

Given that:

Production level of first plant = 6x+13

Production level of second plant = 3x - 7

We will find the difference of both plants manufacture levels.

Difference = First plant - Second Plant

Difference = (6x+13)-(3x-7)

Difference = 6x+13-3x+7

Difference = 3x+20

Hence,

The first plant produces 3x+20 more items daily than the second plant.

Answer: y = 3

Step-by-step explanation: You're given x, find y.

The solution is P ( -3 , 2 )

The value of y from the equation -2x + 3y = 12 is y = 2

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

-2x + 3y = 12   be equation (1)

The point on the line is P = P ( -3 , y )

On simplifying the equation , we get

Substituting the value of x = -3 in the equation , we get

-2x + 3y = 12

-2 ( -3 ) + 3y = 12

6 + 3y = 12

Subtracting 6 on both sides of the equation , we get

3y = 6

Divide by 3 on both sides of the equation , we get

y = 2

Therefore , the value of y is 2

Hence , the point P ( -3 , 2 ) lies on the equation -2x + 3y = 12

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Answer: It takes 8

Step-by-step explanation:

Answer:

1 / 4

Step-by-step explanation:

Number of trials = 120

Landing on 2 = 30

Landing on 3 = 19

Landing on 4 = 25

Landing on 5 = 29

Landing on 6 = 17

The experimental probability of landing in a two:

Experimental probability :

Number of times event occurs / Number of trials

Number of 2 landings = 30

Experimental probability of landing in a 2 ;

30 / 120 = 1/4

Answer:

x^2 - 49= (x+7) (x -7)

Step-by-step explanation:

Answer:

Step-by-step explanation:

False

Answer:

false

Step-by-step explanation:

you can't do that to any number

Answer:

9,613

Step-by-step explanation:

Answer:

769

Step-by-step explanation:

12 x 2278 = 27336

27336 / 34 = 804

804 - 35 = 769

Hope it helps!!!!! :)))

Answer:

14

Step-by-step explanation: 11 - -3=14

Answer:

nonlinear

Step-by-step explanation:

The correct answer is nonlinear because of the 2x^2, it does not come out as a straight line

Answer:

Step-by-step explanation: the answer is d cause when you are in this question for a long time just give up or guess your welcome .

Answer:

A. The length is 5 times the width

Step-by-step explanation:

When a number is next to a variable, like 5x, it means you multiply the number and letter. So "5x" is really saying 5 · x

Since width is equal to x, the length is 5 times the width.

Answer:

The bus will travel 720 miles in 15 hours.

Step-by-step explanation:

As you know that the bus traveled 336 miles in 7 hours and it traveled the same number miles each hour, you can divide the amount of miles it traveled by the number of hours to determine the amount of miles per hour:

336/7=48

Now, you can multiply the number of miles the bus traveled each hour for 15 hours:

48*15=720

According to this, the answer is that the bus will travel 720 miles in 15 hours.

Answer:

D

Step-by-step explanation:

The null hypothesis is that p=0.19. The engineer says that this estimate is too low, meaning he believes the true proportion is greater than 0.19 - p>0.19. Because this is a proportion of ALL houses in the state, we use p rather than phat, leaving D as the correct answer.

Step-by-step explanation:

First, you need to find the difference 3201-2750=451, it has increased by 451, then divide the difference by the original number, which is 2750 because thats what she started off with (3201 would be the new number)

Increase% = Increase ÷ Original Number ×100

451÷2750×100=16.4%

The percent of Maria’s savings increase from 2018 to 2019 will be 16.4%.

A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.

Given that;

The amount of money that Maria had in a savings account at the beginning of 2018 was $2,750.

And, At the beginning of 2019, the same savings account now had $3,201 in it.

Now,

The increased amount = $3,201 - $2,750

                                   = $451

So, The percent of Maria’s savings increase from 2018 to 2019 is,

⇒ Increased percent = 451/2750 × 100

                                = 16.4%

Thus, The percent of Maria’s savings increase from 2018 to 2019 = 16.4%.

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Answer:

4+4+16=24

Step-by-step explanation:

16 cups in a gallon, 4 cups in two pints, and 4 cups in a quart. Hope this helps!

Answer:

Kite and Arrowhead

Step-by-step explanation:

It’s asking for “No pairs of parallel sides”

meaning no Parallel sides. It can’t be Trapezium because it has one pair of parallel sides. {The question is asking for shapes with no parallel sides}

Thank you

Answer: 9/2, 4.5

Step-by-step explanation: