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kvv77 [185]
3 years ago
15

Find the value of the expression 2x3 + 3y2 − 17 when x = 3 and y = 4. A)26 B)85 C)943 D)1,927

Mathematics
1 answer:
Alborosie3 years ago
3 0
Ok so assumin by 2x3 you mean 2x^3 or 2 times x cubed

PEMDAS
parenthasees
exponentes
multiply
divide
add
subtract

exponents

we have
2(3)^3+3(4)^2-17
exonents
3^3=27
4^2=16

now we have
2(27)+3(16)-17
distribute (multply)
2 tiems 27=54
3 times 16=48

now we have
54+48-17
add/subtract
85

answer is 85



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The local train heading for Westford at 60km/h and the express train heading for Eastford at 80 km/h pass each other at Centervi
Wewaii [24]

Answer:

The maximum distance to the nearest kilometer between Westford and Centerville is 111.43 km.

Step-by-step explanation:

Local train stats:

Rate = 60 km/h

Distance = x km

Time = x/60 hours

Express train stats:

Rate = 80 km/h

Distance = (195-x) km

Time = (195-x)/80 hours

Now we will equate both the times.

x/60 =(195-x)/80

x/3= (195-x)/4

4x= 585-3x

7x= 585

x = 83.57 km

195-x=195-83.57= 111.43 km

Hence, the maximum distance to the nearest kilometer between Westford and Centerville is 111.43 km.

3 0
3 years ago
A toy rocket is launched from a platform 24ft above the ground. The
jok3333 [9.3K]

Answer:

4 sec

Step-by-step explanation:

let y = 0 which is the height when the rocket hits the ground

-3t^2 + 6t + 24 = 0

-3(t^2 - 2t - 8) = 0

-3(t - 4)(t + 2) = 0

t = 4  or t = -2

time cannot be negative, so t = 4 sec

8 0
3 years ago
The m∠P is three less than twice the measure of ∠Q. If ∠P and ∠Q are supplementary angles, find the measures of both angles.
notka56 [123]

Answer:

m∠P =119

m∠Q = 61

Step-by-step explanation:

m∠P =  2(∠Q)-3    or p=2(q)-3

supplementary angles so they combine to equal 180!

soooooo we can take  

q+p=180

input what p equals and you get

q+ 2(q)-3=180

3q-3=180

3q=183

q=61

now we have what m∠Q is, so just subtract that from 180 to get m∠P

180-61=119

7 0
3 years ago
A. If she buys a pair of jeans for $102.25 and two shirts that each cost $44.27
slava [35]

Answer:

$481.54

Step-by-step explanation:

672.33-(102.25+(2)44.27)

672.33-(102.25+88.54)

672.33-190.79

481.54

6 0
3 years ago
Which graph represents a function?<br> Graph A <br> Graph B<br> Graph C<br> Graph D
Fiesta28 [93]
Graph A represents a function
3 0
4 years ago
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