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bixtya [17]
3 years ago
8

Factor f(x) = 4x^2 − 5x − 21

Mathematics
1 answer:
jeka943 years ago
4 0

Answer:

x = -7/4, 3

Step-by-step explanation:

Use quadratic formula

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What multiplies to 3025 and adds to -111?
sattari [20]
The numbers 55 and 55.
3 0
3 years ago
A state park charges an entrance fee based on the number of people in a vehicle. A car containing 2 people is charged $14, a car
Artyom0805 [142]

Answer:

Therefore $98 is be charged a bus containing 30 people.

Step-by-step explanation:

Given that,

A state park charges an entrance fee based on the number of people in vehicle.

Let the entry fee for the vehicle be E and entry fee for each person be x.

Then

C= E+(P×x)

C= Total charge in $

E= entry fee for a vehicle

P=No. of person

x= Entry charge per person.

Given A car containing 2 people charged $14

C=$14, P=2

∴14= E+(2× x)

⇒E+2x=14.....(1)

Again A car containing 4 people charged $20

C=$20, P=4

∴20= E+(4× x)

⇒E+4x=20.....(2)

Subtract (1) from (2), we get

E+4x-(E+2x)= 20-14

⇒E+4x-E-2x=6

⇒2x=6

⇒x=3

Putting the value of x in equation (1)

E+(2×3)=14

⇒E=14-6

⇒E=8

Therefore E=$8 and x=$3

Next we check whether our assumption is correct or wrong. Putting the value of E and x for third case

Here P= 8

Therefore C= E+(P×x)

                    = 8+(8× 3)

                    =8+24

                   =$32

Therefore our assumption is correct.

Now C=? , P= 30

The charged for the 30 people is

C= $[8+(30×3)]

  =$[8+90]

 =$98

Therefore $98 is be charged a bus containing 30 people.

4 0
3 years ago
Help pls! I can't figure it out
katrin2010 [14]
Answer:

It’s 72
Hope this helps!
5 0
3 years ago
Help pls also an answer ​
Schach [20]

84.5-19.7= 67.8

67.8÷6= 11.3

11.3 yards per curtain

4 0
3 years ago
Read 2 more answers
A school of salmon was swimming in the river 5 feet below the surface. To escape a hungry bear, they went down another 3 feet. W
garik1379 [7]

Answer:

8 Feet below the surface

Step-by-step explanation:

If the salmon were initially 5 feet below the surface, and then travelled down an additional 3 feet from the initial 5, then the new position would be 8 feet down relative to the surface.

You can write this as -5 + -3 = -8, assuming that 0 represents surface level.

Cheers.

3 0
3 years ago
Read 2 more answers
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