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joja [24]
3 years ago
7

Find the value. X3-4 when x=3 PLEASE HELP!!! ASAP!!!

Mathematics
2 answers:
DENIUS [597]3 years ago
7 0

Answer:

23

Step-by-step explanation:

Raise 3 to the power of 3

27 - 4

Subtract 4 from 27

23

Hope this was correct

andrew11 [14]3 years ago
4 0

<u>Answer:</u>

<u><em>23</em></u>

<u />

<u>Explanation:</u>

<u />

step 1 - rewrite the expression with the value of x

x^3 - 4

(3)^3 - 4

step 2 - solve the exponent

(3)^3 - 4

27 - 4

step 3 - subtract

27 - 4

23

therefore, the value of the expression is <u><em>23.</em></u>

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Need to show my work
dalvyx [7]

Answer:

\large\boxed{x=\dfrac{5}{4},\ y=\dfrac{15}{16}}

Step-by-step explanation:

\left\{\begin{array}{ccc}y=\dfrac{3}{4}x&(1)\\\dfrac{5}{2}x+2y=5&(2)\end{array}\right\\\\\text{Substitute}\ (1)\ \text{to}\ (2):\\\\\dfrac{5}{2}x+2\left(\dfrac{3}{4}x\right)=5\\\\\dfrac{5}{2}x+\dfrac{3}{2}x=5\\\\\dfrac{5+3}{2}x=5\\\\\dfrac{8}{2}x=5\\\\4x=5\qquad\text{divide both sides by 4}\\\\x=\dfrac{5}{4}

\text{Put the value of}\ x\ \text{to (1)}\\\\y=\dfrac{3}{4}\cdot\dfrac{5}{4}\\\\y=\dfrac{15}{16}

4 0
3 years ago
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#if a sum become rs 6480 in 3 years and rs 7776 in 4 years interest being compounded annually, find the sum and rate of interest
Andrei [34K]

Answer:

The rate of interest is 20% and the sum is $3,750

Step-by-step explanation:

In order to calculate the sum and rate of interest we would have to make the following calculation:

rate of interest= (sum in 4 years-sum in 3 years)*100/sum in 3 years*1

According to the given data we have the following:

sum in 4 years=$7,776

sum in 3 years=$6,480

Therefore, sum in 4 years-sum in 3 years=$7,776-$6,480=$1,296

Therefore, rate of interest=$1,296*100/$6,480*1

rate of interest=20%

To calculate the sum we would have to make the following calculation:

FV=PV(1+20%)∧3

$6,480=PV(1,20)∧3

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8 0
3 years ago
Twenty-five members of the eighth grade class at Park Center Middle School are going to a museum and then to lunch. Each student
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2) the cost for the trip which is $443.75 to be divided by the 25 students, so it is $443.75 / 25 = $17.75/student

Now, you can add up those two costs per student to have the total cost per student:

$7.25 + $17.75 = $25.00/student

Answer: $25.00
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3 years ago
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Free points
marishachu [46]

Answer: IT EQUALS 2

Step-by-step explanation:

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