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Paul [167]
3 years ago
14

In need of help please

Mathematics
1 answer:
Alisiya [41]3 years ago
7 0

Answer:

Step-by-step explanation:

1-4

1

n=30/1

so it would be (t,n) instead of (x,y) respectively

so the first would be (1,30)

2. n=30/2

second would be (2,15)

3. n=30/3

third would be (3,10)

4.

n=30/4

fourth would be (4,7.5)

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PLS HELP IF YOU WANT
Nastasia [14]

Answer:45 * t = 2.5 * (1-t)...the equation will have one solution.

Step-by-step explanation:

For this case, the first thing you should know is:

d: v * t

Where,

d: distance

v: speed

t: time

To go to school by bus we have:

d = 45 * t

To return from school we have:

d = 2.5 * (1-t)

how the distance is the same:45 * t = 2.5 * (1-t)

3 0
2 years ago
Read 2 more answers
Evaluate the expression for the given value of the variable 5 ×(h+3) for h=7
Bad White [126]

Answer:

<h2>50</h2>

Step-by-step explanation:

Put h = 7 to the expression 5 · (h + 3):

5\cdot(7+3)=5\cdot10=50

5 0
3 years ago
Systems with three variables. please help
kirza4 [7]
X= 6
Y= 0
Z= -2

CHECK
3x + y -2z =22
3(6) + 0 -2(-2) =22
18 + 0 +4= 22
22=22

x+5y+z =4
6 +5(0)+ -2 =4
6 + 0 +-2 = 4
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3 0
3 years ago
I need help with these 2
Slav-nsk [51]

Answer:

Step-by-step explanation: Hey for the second one I got y = -3/4x -0.5 I'm not sure if its correct though sorry if not
ill try my best to explain my solution though
1. From the parallel equation (3x + 4y = 12) all we need to do is find the slope

So the easiest way to do so is to put the said equation in <u>y-intercept </u>form

y=mx +b
m= slope

b= y intercept

so 1. 3x + 4y = 12

=

4y = 12-3x

divide that by 4 to get only y

y=3-3/4x

-3/4 is our slope

y=-3/4x+b

than we have a point -2, -2

if we put -2 for y

-2=-3/4x+b

and then we put our -2 for x
-2 = -3/4 * -2 + b

=

-2  = -1.5 +b
b=-0.5

Answer : y=-3/4x-0.5

4 0
2 years ago
Laney ordered 12 copies of the same book for his book club members the book cost $19 each in the order has a $15 shipping charge
liubo4ka [24]

Answer:

$408

Step-by-step explanation:

15+19=34

34×12=408

Total cost of order $408

7 0
3 years ago
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