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3 years ago

12.

1 answer:

6 0

Are those supposed to be comas or decimal points , if they’re comas then i think the scientific notation would be 1.222 x 10^8

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Full working out please ^^ for the first question , ty

sp2606 [1]

Answer:

Step-by-step explanation:

Given

y = 2x² - kx + 3

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

Since the curve touches the x- axis at one place then the roots are real and equal and the discriminant for this condition is

b² - 4ac = 0, that is

(- k)² - (4 × 2 × 3) = 0

k² - 24 = 0 ( add 24 to both sides )

k² = 24 ( take the square root of both sides )

k = ± $\sqrt{24}$ = ± 2 $\sqrt{6}$

k = 2 $\sqrt{6}$ or k = - 2 $\sqrt{6}$ → E

7 0

3 years ago

Write an inequality to represent the graph. a dashed line passing through points 0 comma negative 3 and 2 comma 2 with shading a

Arturiano [62]

Answer:

y > 2.5x - 3

Step-by-step explanation:

(0,-3) and (2,2)

Slope: (2--3)/(2-0) = 5/2

Y-intercept is -3

Above the line:

y > (5/2)x - 3

y > 2.5x - 3

8 0

3 years ago

Read 2 more answers

Which best defines the relashionship between speed and velocity 1.speed is velocity with displacement 2.velocity is speed with d

katrin [286]

Answer:

3. Speed is based on a specific direction

Step-by-step explanation:

Generally, speed is a scalar quantity equal to the magnitude of velocity. Velocity is a vector quantity that is speed together with a specific direction.

The answer choice that seems most in agreement with this description seems to be ...

3. Speed is based on a specific direction

3 0

4 years ago

Plz help this is due tonight and I have no clue :(

motikmotik

Section 1:

using this format we can determine what the answer is:

42 105
—— • ——-
100 x

(the spacing may be off but imagine two separate fractions)

first multiply 100 by 105 to get 10,500

then divide by 42 to get 250

this means that sasha’s book has 250 pages

section b:

using the same formula we can solve this problem:

first we need to multiply 250 by 2 to get the total cost of both tickets

175 x
—— • ——
100 500

(again spacing may be off but think of two separate fractions)

then multiply 500 by 175 to get 87,500

then divide by 100 to get 875

to find the profit subtract 875-500

this means he will make $375 profit

conclusion:

sasha’s book has 250 pages

trevor will make $375 profit

this is the method my teacher taught me last year so it should be right, hope this helps and please mark brainliest!!

8 0

3 years ago

Carl and rose live in the same straight road. From their balconies they can see a flagpole in the distance. The angle that each

Andreyy89

Carl and Rose' balconies make up the base of an isosceles triangle.

Their distances from the flagpole is the same.

From the question, we understand that:

Carl and Rose live on a straight line
The measure of angle from each person's balcony to the flagpole is the same

The above highlights mean that:

The relationship between Carl and Rose' balconies and the flagpole is an isosceles triangle.

Where Carl and Rose' balconies form the base of the isosceles triangle.

Hence, their distances from the flagpole is the same.