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2 years ago

- kobby is 5 years younger than Nana

Mathematics

2 answers:

viva [34]2 years ago

5 0

Kobby is 1 and nana 6

Darina [25.2K]2 years ago

4 0

Answer:

Kobby is 1 and Nana is 6

Step-by-step explanation:

lets mark Kobby's present age x, than Nana's present age would be x+5.

four years later Kobby's age would be x+4, and Nana's x+5+4, or 2(x+4).

x+5+4=2x+8

x-2x=8-5-4

-x=-1

x=1

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9. What is the vertex of the function? f(x) = 3x² - 8x + 10

Delvig [45]

Answer:

The vertex of the function is (1.333, 4.667)

Step-by-step explanation:

1. Calculate -b / 2a. This is the x-coordinate of the vertex.

2. simply plug -b / 2a into the equation for x and solve for y.

$Y = 3x^{2} - 8x + 10\\Compare with the form of y = ax^{2} + bx + c\\So that means a = 3, b = -8, and c = 10.$

Calculate -b/2a:

$X = -(-8)/2(3)$

$X = 8/6$

This is equal to 1.33 recurring

Plug 8/6 for x and solve for y:

$Y = 3x^{2} - 8x + 10$

$Y = 3(\frac{8}{6})^{2} - 8(\frac{8}{6}) + 10$

$Y = \frac{48}{9} - \frac{64}{6} + 10\\$

This is equal to 4.66 reccuring.

7 0

1 year ago

What is the area of Vivian’s garage door?

sergey [27]

The area of Vivian’s garage door is 62.5 square feet

<h3>Area of composite shape.</h3>

The Vivian garage is made up of a trapezoid and a rectangle. The area of the door is expressed as;

Area = Area of rectangle + area of trapezoid

Area = (5 * 8) + 0.5(7 + 8)*3
Area= 40 +22.5
Area = 62.5 square feet

Hence the area of Vivian’s garage door is 62.5 square feet

Learn more on composite shapes here: brainly.com/question/8370446

#SPJ1

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Step-by-step explanation:

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