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3 years ago

The sum of 2 numbders are 21 the 2nd number is six times the first number work out the two numbers

Mathematics

1 answer:

Reika [66]3 years ago

7 0

Answer:

3, 18

Step-by-step explanation:

To write an equation or an expression, define the variables.

x is the first number.

6x is the second number since it is 6 times the first.

Add the expressions together to 21 to solve.

x + 6x = 21

7x = 21

x=3

The first number is 3. The second is 6*3 = 18.

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Farmer Fran would like to build a chicken coop in order to raise chickens and sell their eggs. She determines that the area of t

Maru [420]

Answer:

The chicken coops needs to be atleast 25 feet in width.

Step-by-step explanation:

The chicken coop is in a shape of a rectangle.

Area of rectangle is given by length * width

Since, length is given as 12 ft and area is given as minimum 300 ft, the width can be found by substituting these values into the area formula:

$Area=Length*Width\\300=12*Width\\Width=\frac{300}{12}=25$

The chicken coops needs to be atleast 25 feet in width.

5 0

3 years ago

Write an inequality for the following.<br> Jackie spent no more than $40 on a video

ANEK [815]

Answer:

x ≥ $40

Step-by-step explanation:

Jackie didn't spend more than $40 on a video.

x ≥ $40

7 0

3 years ago

The model represents an equation.

madreJ [45]

Answer:

9/5

Step-by-step explanation:

solve the original equation for x

-4× + 3 = 1x +(-6)

-1x

-5x + 3 = -6

-3

-5x = -9

/-5

x = 9/5

CHECK

-4(9/5) + 3 = 1(9/5) +(-6)

-21/5 = -21/5

8 0

3 years ago

Find both of the x values

gulaghasi [49]

3x - 14 = 2x + 25

+14 +14

3x = 2x + 39

-2x -2x

x= 39

therefore x is 39. If you want to find the exact angel, just substitute 39 into x, solve for it and it should give you the exact angel.

Hope I helped :)

8 0

4 years ago

Read 2 more answers

consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i

eimsori [14]

we have

$f(x)=x^{2} +2x-15$

we know that

The x-intercept is the value of x when the value of the function is equal to zero

in this problem

Find the roots of the function

equate the function to zero

$x^{2} +2x-15=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$x^{2} +2x=15$

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} +2x+1=15+1$

$x^{2} +2x+1=16$

Rewrite as perfect squares

$(x+1)^{2}=16$

Square root both sides

$(x+1)=(+/-)\sqrt{16}$

$(x+1)=(+/-)4$

$x=-1(+/-)4$

$x1=-1+4=3$

$x2=-1-4=-5$

$x^{2} +2x-15=(x-3)(x+5)$

therefore

<u>the answer is</u>

the x-intercepts are the points $(3,0)$ and $(-5,0)$

3 0

3 years ago

Read 2 more answers