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3 years ago

Which expression represents " half the sum of 5 and a number b"?

Mathematics

1 answer:

defon3 years ago

5 0

Hm... okay so what i got was A = B+5/2 because that is the only one that fits.

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Find the discriminant of 3x^2-10x=-2

Oksanka [162]

Answer:

Step-by-step explanation:

given a quadratic equation in standard form : ax² + bx + c = 0 : a ≠ 0

then the discriminant is Δ = b² - 4ac

given 3x² - 10x = - 2 ( add 2 to both sides )

3x² - 10x + 2 = 0 ← in standard form

with a = 3, b = - 10 and c = 2

b² - 4ac = (- 10)² - (4 × 3 × 2) = 100 - 24 = 76

7 0

3 years ago

What’s the vertical and horizontal line?

coldgirl [10]

Answer:

Part 1) Vertical line : $x=1$

Part 2) Horizontal line : $y=-4$

Step-by-step explanation:

Part 1) Write the equation for the vertical line passing through the point (1,-4)

we know that

The equation of a vertical line (parallel to the y-axis) is equal to the x-coordinate of the point that passes through it

The x-coordinate is 1

therefore

The equation of the line is

$x=1$

Part 2) Write the equation for the horizontal line passing through the point (1,-4)

we know that

The equation of a horizontal line (parallel to the x-axis) is equal to the y-coordinate of the point that passes through it

The y-coordinate is -4

therefore

The equation of the line is

$y=-4$

5 0

3 years ago

I NEED HELPPP PLEASE

Tanzania [10]

Answer:

252 cubic cm

Step-by-step explanation:

V = (l x w x h ) / 3

V = (6 cm x 9 cm x 14cm) / 3

V = 756/3 = 252 cubic cm

8 0

3 years ago

Read 2 more answers

David can finish painting the room in 6 hours, and his elder brother Antony can finish it in 4 hours. If both brothers paint the

erica [24]

Answer:

Step-by-step explanation:

1/6+1/4=5/12

5/12 of the job is done in 1 hour

5/12+5/12= 10/12

so 10/12 of the job is done in 2 hours

and then simplify 5/6 so then add 1/6

so it is done in 2 hours and 24 minutes

7 0

3 years ago

How do i tell if a relation is a function?

kramer

You can set up the relation as a table of ordered pairs.

4 0

3 years ago