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Elena-2011 [213]
3 years ago
7

X-y = -10 2x+4y=22 substitution

Mathematics
1 answer:
Tema [17]3 years ago
4 0

Answer:

[1]    x - 4y = 22

  [2]    2x + 5y = -21

Step-by-step explanation:

Solve equation [1] for the variable  x  

 

 [1]    x = 4y + 22

// Plug this in for variable  x  in equation [2]

  [2]    2•(4y+22) + 5y = -21

  [2]    13y = -65

// Solve equation [2] for the variable  y  

  [2]    13y = - 65  

  [2]    y = - 5  

// By now we know this much :

   x = 4y+22

   y = -5

// Use the  y  value to solve for  x  

   x = 4(-5)+22 = 2

I am sorry if I get it wrong.

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A person jogged 10 times along the perimeter of a rectangular field at the rate of 12 kilometers per hour for 30 minutes. If fie
balu736 [363]

Answer:

20,000m²

Step-by-step explanation:

If they jog 12 km/h for half an hour, they have covered.

12 X 0.5 = 6km in 10 circuits. Making 1 perimeter

6 / 10 =0.6 km (600 m).

To determine area we need to convert this perimeter to length and width. We know that it is a rectangle, with 2 equal widths and 2 equal lengths, and the length is twice the width.

So L = 2W

Perimeter = 2W + 2L

600 m = 2W + 2(2W)

600 m = 6W

W = 100 m

L = 200 m

Area = 100 X 200 = 20,000 m²

4 0
3 years ago
What is the value of 0.363636... times 11/2? <br> PLEASE HELP
Neko [114]
.363636 * 5.5 = 1.999998
8 0
3 years ago
Read 2 more answers
By definition, (fog)(x) = f(g(x))So if g(2) = 3 and f(3) = 16, then (fog)(2) =
marusya05 [52]

Answer:

(f\circ g)(2)=16

Step-by-step explanation:

By definition composite function would be:

(f\circ g)(x)=f(g(x))

Then, if g(2)=3 and f(3)=16, therefore for f(g(x)):

\begin{gathered} (f\circ g)(x)=f(g(2))=f(3) \\ \text{Hence,} \\ (f\circ g)(2)=16 \end{gathered}

6 0
1 year ago
Xander needs to collect at least 120 cans for a food drive to earn community service credit. He has already collected 64 items.
Aleksandr [31]

Answer:

c ≥ 56   is the REQUIRED INEQUALITY.

Step-by-step explanation:

Here, the given  question is INCOMPLETE.

Xander needs to collect at least 120 cans for a food drive to earn community service credit. He has already collected 64 items. Choose the inequality and solution to represent the number of cans, c, that Xander must still collect.

Now, here:

The number of cans Xander needed to collect = At least 120

The number of items already collected =  64

c: the number of cans, c, that Xander must still collect.

Now, the number of cans to be collected  - Cans already collected  

=  120 - 64  = 56

So, the number of can he must collect to make a TOTAL OF AT LEAST 120 cans  =  56 cans

⇒ The number of cans to be collected ≥ 56 cans

⇒c ≥ 56 cans

or, c ≥ 56   is the REQUIRED INEQUALITY.

3 0
3 years ago
Negative 1 over 2 x + 1 = −x + 8
Damm [24]

Answer:

no

Step-by-step explanation:

8 0
3 years ago
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