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3 years ago

0=2x^2+3x+4steps and answer pls

Mathematics

1 answer:

serious [3.7K]3 years ago

5 0

I will place 0 on the right side.

2x^2+3x+4 = 0

2 times 4 = 8.

What two numbers yield a product of 8 but when added produce a sum of 3, the middle term's coefficient?

There is no such number.

So, gotta use the quadratic formula.

I will set it up and let you do the math.

See attachment for the set up.

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The length of a rectangular is 5/2 unites greater then twice its width if it’s width w which expression gives the perimeter of t

strojnjashka [21]

If width is w the length can be represented as 5/2+2w.

Formula for perimeter is 2l + 2w

So it would be 2w + 2(5/2 + 2w)

OR 2w + 5 + 4w

OR 6w + 5

See if this helps ;)

5 0

3 years ago

John stands 150 meters from a water tower and sights the top at an angle of elevation of 36º. If John's eyes are 2 meters above

horsena [70]

Answer:

The height of tower $DB=111\ meters$ .

Step-by-step explanation:

Diagram of the given scenario is shown below.

Given that,

Distance between John and tower is $CE=150 \ meters$ .

Angle of elevation to the top of the tower is $\angle DEC=36$ °.

Height of John is $CB=2\ meters$ .

To Find: Height of the tower $DB$ .

So,

In triangle ΔDCE,

$Tan$ (∠ $DEC)= \frac{DC}{CE}$

$Tan (36)= \frac{DC}{150}$

$DC= tan(36)\times 150$

$DC=108.98\ meters$

Now,

To calculate the height of tower we have

$DB=DC+CB$

$DB=108.98+2$

$DB=110.98\ meters$ ≈ $111 \ meters$

Therefore,

The height of tower $DB=111\ meters$ .

6 0

3 years ago

3x+7=5x-21 Find the value of x

gregori [183]

So try to get the x term to one side by itself
add 21 to both siede
3x+28=5x
subtract 3 x from both sides
28=2x
divide 2
14=x

8 0

4 years ago

Read 2 more answers

1. Last week, Mr. Key worked for 50 hours. This week, he work for 58 hours. 2p

quester [9]

Answer:

16% increase

Step-by-step explanation:

A percentage change can be calculated from ...

percentage change = ((new value)/(old value) -1) × 100%

= (58/50 -1) × 100% = (1.16 -1) × 100%

= 16%

Mr. Key's work hours increased 16% from last week to this.

5 0

3 years ago

Geometry...Please help as soon as possible please and Thank you!!!

Triss [41]

Answer:

Step-by-step explanation:

Statment1. BD bisects ∠ABC

Reason1. Given

Statment 2. ∠ABD≅∠DBC (A)

Reason2. Definition of angle bisector

Statment 3. BD≅BD (S)

Reason3. Reflexive propriety

Statement 4. ∠BDA≅∠BDC (A)

Reason 4. Given

Statement 5 ΔABD≅ΔCDB

Reason 5. ASA theorem of congruency

8 0

3 years ago

0=2x^2+3x+4steps and answer pls​

0=2x^2+3x+4steps and answer pls