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MrRissso [65]
3 years ago
5

X + y = 30 2x + 4y = 84 Substitution or Elimination I

Mathematics
1 answer:
miv72 [106K]3 years ago
3 0

Answer:

(X,Y)(18,12)

Step-by-step explanation:

x + y = 30

2x + 4y = 84

___________

2x+2y=60

2x+4y=84

_________

-2y=-24/-2y

y=12

2x+4(12)=84

2x+48=84

2x=84-48

2x/2=36/2

X=18

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Drag the correct steps into order to solve the equation 6x+6= -12 for x
damaskus [11]

Answer:

x = -3

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 6 from both sides:

6x + 6 (-6) = -12 (-6)

6x = -12 - 6

6x = -18

Isolate the variable, x. Divide 6 from both sides:

(6x)/6 = (-18)/6

x = (-18)/6

x = -3

x = -3 is your answer.

~

8 0
3 years ago
Nancy walk 50 Minutes each day for 4 Days last week Gullian walked 35 minutes each day for 6 days last week.How does the total n
Gre4nikov [31]

Answer:

Last week Gullian walked 10 minutes more than Nancy.

Step-by-step explanation:

1. Nancy walk 50 minutes each day for 4 days last week, then the total number of minutes Nancy walked is

50\cdot 4=200\ \text{minutes}.

2. Gullian walked 35 minutes each day for 6 days last week, then the total number of minutes Gullian walked is

35\cdot 6=210\ \text{minutes}.

3. Since 200 than last week Gullian walked 10 minutes more than Nancy.

8 0
3 years ago
Freshman geometry!!! number for please help!!
BARSIC [14]

Option C:

The perimeter of the rhombus is 100 inches.

Solution:

AC = 30 inches, BD = 40 inches

In rhombus, diagonals bisect each other at right angles.

AE = CE = 15 inches

BE = ED = 20 inches

In ΔAED, ∠E = 90°

Using Pythagorean theorem,

AD^2=AE^2 +ED^2

AD^2=15^2 +20^2

AD^2=225+400

AD^2=625

AD^2=25^2

Taking square root on both sides, we get

AD = 25 inches

In rhombus, all sides are equal in length.

AD = DC = CB = BA = 25 inches.

Perimeter = AD + DC + CB + BA

                 = 25 + 25 + 25 + 25

                 = 100 inches

The perimeter of the rhombus is 100 inches.

Option C is the correct answer.

5 0
3 years ago
What is the slope of the line?<br> hurryyyy
Fittoniya [83]

Answer:

slope = 3

Step-by-step explanation:

if each square is equal to 1

The slope has to be 3.

you can see it, because between those 2 point you can count 3 spaces in y-vertex, and 1 space in x-vertex

what that means is that we will move 3 steps up (or down) for each 1 space in x-vertex.

you can see it just right there on the graph

4 0
3 years ago
One type of fabric costs $31.25 for 5 square yards. Another type of fabric costs $71.50 for 11
Naily [24]

Answer:

as ratio of two type of fabric is different .

hence, the relationship between the number of square yards and the cost

is not proportional between the two types of fabric

Step-by-step explanation:

For a relation to be proportional

a:b = c:d

in other form

a/b = c/d

______________________________________________

Ratio for first type of fabric

cost of fabric/ area of fabric = 31.25/5 = 6.25

Ratio for other type of fabric

cost of fabric/ area of fabric = 71.50/11 = 6.5

as ratio of two type of fabric is different .

hence, the relationship between the number of square yards and the cost

is not proportional between the two types of fabric

7 0
3 years ago
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