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3 years ago

Which of the following constants can be added to x^2- 3x to form a perfect square trinomlal?

Mathematics

1 answer:

creativ13 [48]3 years ago

8 0

Answer:

A 21/4

Step-by-step explanation:

When forming a perfect square trinomial you need to "complete the square".

All of the steps to completing the square when solving an equation:

1. The leading coefficient must be 1.

2. Divide b by 2.

3. Square (b/2)

4. Add (b/2)^2 to both sides to keep the polynomial balanced.

5. You can now write the perfect square trinomial and solve.

x^2 - 3x

-3/2

(-3/2)^2 = 9/4 = 2 1/4

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Please help D:<br> mathswatch question

algol13

Answer:

first you have to find the values of the two sides of the rectangle. BC=5 cm

Area of a trapezium

= 1/2 x (5+9) x (11-5)

= 42 cm^2

4 0

3 years ago

Kira runs 7 miles in 60 minutes. At the same rate, how many miles would she run in 24 minutes.

erastovalidia [21]

Answer:

2.8 miles

Step-by-step explanation:

brian runs 7 miles in 60 minutes at the same rate how many miles would he run in 24 minutes?

(24/60)*7=2.8 miles

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3 years ago

Seema bought a new pair of jeans that were on sale the original price of jeans was $56 the store had marked them down by 25% and

ohaa [14]

C. 33.60

that would be because 25% of 56 is 14 so 56-14=42
and 20% of 42 is 8.40
so 42-8.4= 33.60

$33.60 is your answer

8 0

3 years ago

Read 2 more answers

For the data set below identify the interquartile range of the data.

Makovka662 [10]

To find the range of a set, subtract the largest number and the smallest number. Those numbers, in this set, are 63 and 34.

63-34=29

So the range is 29

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sorry if I didn't help

6 0

3 years ago

Read 2 more answers

The optimal height h of the letters of a message printed on pavement is given by the formula <img src="https://tex.z-dn.net/?f=h

choli [55]

Answer:

The value of h is 42.956 approximately.

Step-by-step explanation:

Consider the provided formula $h=\dfrac{0.00252 d^{2.27}}{e}.$

Here d is the distance of the driver from the letters and e is the height of the driver's eye above the pavement. All of the distances are in meters.

We need to find the value of h where the value of d = 92.4 m, e = 1.7 m.

Substitute d = 92.4 m, e = 1.7 m in above formula and solve for h.

$h=\dfrac{0.00252\left(92.4\right)^{2.27}}{1.7}$

$h\approx\dfrac{0.00252\left(28978.4648\right)}{1.7}$

$h\approx\dfrac{73.0257}{1.7}$

$h\approx42.956$

Hence, the value of h is 42.956 approximately.

8 0

3 years ago