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3 years ago

(-9) + (+3)= in adding integers

Mathematics

2 answers:

Harrizon [31]3 years ago

8 0

Answer:

(-9) + (+3) = (-6)

Umnica [9.8K]3 years ago

7 0

Answer:

The answer is -6

hope this helps

have a good day :)

Step-by-step explanation:

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Plz help asap almost done

Makovka662 [10]

Answer:

5(-2.1)-4(-8.9)= 25.1

Step-by-step explanation:

lol

7 0

3 years ago

Herbert has three lawn-mowing jobs. One lawn is shaped like a trapezoid,

sergij07 [2.7K]

Answer:

4.125 hours

Step-by-step explanation:

Trapezoid shaped lawn :

Bases : 90 ; 126 ; height = 90

Area of trapezium = 1/2(a+b) h ; a and B are the bases and h = height

Area of trapezium = 1/2(90 + 126) * 75

Area = 108 * 90 = 8100 feets

Triangular lawn :

Height = 80 feets ; Base = 105 feets

Area of triangle = 1/2 base * height

Area = 1/2 * 80 * 105 = 4200 feets

Rectangular lawn :

Length = 120 feets ; width = 90 feets

Area of rectangle = Length * width

Area = 120 * 90 = 10800 feet²

Area of all 3 lawns = (8100 + 4200 + 10800) = 23100

In 2 hours ; Herbert can now (160 * 70) = 11200 feets

23100 / 11200 = 2.0625

Tine required to mow all three lawns :

2 hours * 2.0625 = 4.125 hours

= 4 hours, 7 minutes, 30 seconds

8 0

2 years ago

Given the equation 4x2 − 8x 20 = 0, what are the values of h and k when the equation is written in vertex form a(x − h)2 k = 0?

Westkost [7]

The vertex form of the given quadratic equation is

$4(x-1)^{2} + 16 =0$ .

According to the given question.

We have a quadratic equation

$4x^{2} -8x + 20 = 0$

Since, for the standard quadratic form is $ax^{2} +bx + c = y$ , the vertex form of a quadratic equation is $y = a(x -h)^{2} + k$ where (h, k) is the vertex.

And h and k can be calculated as

h = -b/2a and y = k

So, for the given equation $4x^{2} -8x + 20 =0$ the vertex (h, k) is given by

h = -(-8)/2(4) = 8/8 = 1 (X coordinate of vertex)

and,

$y =4x^{2} -8x+ 20$

substitute x = 1 in the above equation for the value of k

Y = 4(1)(1) - 8(1) + 20

⇒ Y = 4 - 8 + 20

⇒ Y = -4 + 20

⇒ Y = 16

so, k = 16 (Y coordinate of vertex)

Now, substitute the value of a, k and h in $y = a(x-h)^{2} + k$ .

⇒ $0 =4(x-1)^{2} + 16$

Therefore, the vertex form of the given quadratic equation is

$4(x-1)^{2} + 16 =0$ .

Find out more information about vertex form of a quadratic equation here:

brainly.com/question/12223454

#SPJ4

6 0

1 year ago

Grace used a container shaped like a cylinder for her dog's food. It's radius is 4 inches and it's height is 5 inches. find the

Advocard [28]

Answer:

251.33 cubic inches

Step-by-step explanation:

The formula for the volume of a cylinder = πr²h

r = Radius = 4 inches

h = Height = 5 inches

Volume of a Cylinder = π × 4² × 5

= 251.32741 cubic inches

Approximately , the Volume of the cylinder = 251.33 cubic inches.

6 0

3 years ago

The admission fee at an amusement park is 3.75 for children and 7.00 for adults. On a certain day, 303 people entered the park,

Lynna [10]

Answer:148 children and 155 adults

7 0

3 years ago