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matrenka [14]
3 years ago
14

Is (2,5) a solution to this system of equation

Mathematics
1 answer:
spayn [35]3 years ago
4 0
(2,5) is not a solution because 2(2)+2(5)=15 is not true.
You might be interested in
How many ways can a 6 question quiz be answered with 4 choice answers?
Setler79 [48]
Chose from 6 answers only 4. When you chose one to use in the first place, you cant use it again so, choice narows to 5, and then narows to 4 and 3. Then just multiply numbers and whoila, there is your answer=300. There are 300 combinations to answer the quiz

6 0
3 years ago
(dads age:  28 years old   when  cindys age : 2 years old .)
Delicious77 [7]
So dad=28
cindy=2
so 28-2=diffirance in age=26

A.  dad-26=cindy
      cindy=dad-26
      dad=cindy+26
    so since cindy=18
dad=18+26=44

B. if dad =42=cindy+26 so 
42=x+26
subtract 26 from both sides
16=x
cindy =16 if dad =42

C. so the number of years apart they will be will always be 26 (until one of them dies)
4 0
4 years ago
For what values of q are the two vectors A = i + j + kq each other and B-iq-23 + 2kg perpendicular to
Sloan [31]

Answer:

The value of q are 0.781,-1.281.

Step-by-step explanation:

Given : Two vectors A=i+j+kq and B=iq-2j+2kq are perpendicular to each other.

To find : The value of q ?

Solution :

When two vectors are perpendicular to each other then their dot product is zero.

i.e. \vec{A}\cdot \vec{B}=0

Two vectors A=i+j+kq and B=iq-2j+2kq

(i+j+kq)\cdot (iq-2j+2kq)=0

(1)(q)+(1)(-2)+(q)(2q)=0

q-2+2q^2=0

2q^2+q-2=0

2q^2+q-2=0

Using quadratic formula,

q=\frac{-1\pm\sqrt{1^2-4(2)(-2)}}{2(2)}

q=\frac{-1\pm\sqrt{17}}{4}

q=\frac{-1+\sqrt{17}}{4},\frac{-1-\sqrt{17}}{4}

q=0.781,-1.281

Therefore, The value of q are 0.781,-1.281.

6 0
3 years ago
Can you help me on both
djyliett [7]

Answer:

first one  is 8%

and second one  is 20%

Step-by-step explanation:

6 0
4 years ago
the area of a rectangular wall of a barn is 260 square feet. it's length is 6 feel longer than twice it's width. find the length
scoundrel [369]
L=2w+6
260=lw

Substitute for l
260=w(2w+6)
260= 2w^2+6w
2w^2+6w-260=0
2(w^2+3w-130)
2(w+13)(w-10)
w=-13, w=10

Since width cannot be negative it must be 10
260=l(10)
26=l

Final answer: length-26 ft, width-10ft
6 0
3 years ago
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