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Inessa [10]
3 years ago
6

Solve and check the fallowing system of equations algebraically x+y=5 plz Help Me

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
4 0

Answer:y=-x+5

Step-by-step explanation:

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Y=-2/3x+3 I'm super stuck
Serhud [2]

Answer:

x=0  y=3

Step-by-step explanation:

4 0
3 years ago
Pls answer this it’s worth 100 points!!!
aliina [53]

Answer:

which problem is the one u need help on or everything?

Step-by-step explanation:

6 0
3 years ago
The sum of 2 numbers is 16, and the sum of their squares is 146. find the 2 numbers
sashaice [31]

Step-by-step explanation:

x + y = 16 (*)

x^2 + y^2 = 146 (**)

(*) <=> x= 16-y

substitute x = 16 - y

(**) <=> (16-y)^2 + y^2 = 146

<=> y^2 - 2.16.y + 16^2 + y^2 = 146

<=> 2y^2 - 32y + 110 = 0

<=> y^2 - 16y + 55 = 0

<=> (y-11)(y-5) = 0

<=> y=11 or y= 5

For y = 11, we have x= 16-11=5

For y=5, we have x= 16-5=11

Answer: (x,y) = (11,5) ; (5,11)

3 0
3 years ago
Determine whether the graphs of the two equations are perpendicular x-7y=4 and 21x+3y=11
Sveta_85 [38]

Step-by-step explanation:

when multiplied together, the gradients of the 2 graphs should equal -1 (of they are perpendicular).

x-7y=4

-7y= -x + 4

y= -1/7 x + 4/7

21x+ 3y=11

3y=-21x+11

y=-21/3 x + 11/3

-21/3 * -1/7 = 1

when multipled together, the 2 gradients dont equal -1 therefore they are not perpendicular

unless I've made a mistake with the signs at some point haha

3 0
3 years ago
Find the perimeter of the figure shown above.<br> a. 40 cm<br> b. 60 cm<br> C. 52 cm<br> d. 75 cm
vovikov84 [41]
C. 52 cm , unknown sides are 3 and 7
8 0
3 years ago
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