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Amanda [17]
3 years ago
10

While shopping this week I misread my shopping list and bought 5 bread and 2 milk. I got a refund and bought 2 bread and 5 milk.

This cost me $4.20 less than my first purchase. How do the prices of bread and milk compare?
A) Bread costs $1.40 more than milk.
B) Bread costs $0.60 more than milk.
C) Bread costs $0.42 more than milk.
D) Bread costs $0.60 less than milk.
E) Bread costs $1.40 less than milk
Mathematics
2 answers:
user100 [1]3 years ago
8 0
Suppose  x is the total cost for the first purchase, cost of the bread = b and cost of the milk = m
Then:-
 y     =    5b + 2m
y - 4.2 = 2b + 5m
Subtract:-
4.2 = 3b - 3m
b - m = 4.2 / 3 = 1.4

That is bread costs $1.40 more than the milk.   (Answer).  Its A
Dahasolnce [82]3 years ago
8 0

Answer:

B

Step-by-step explanation:

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Which equation has a k-value of -12<br>A. y=-12x<br>B. y=12+12x<br>C. y=x-12<br>D. y=12x+1
CaHeK987 [17]
I would say A. I'm assuming this is to do with the equation y=kx, therefore A has the k value of -12
3 0
3 years ago
How many 4 digit multiples can not be divided by 5
Advocard [28]

Answer:

1800

Step-by-step explanation:

Let us solve this question by Modular Airthmatic.

Let the lowest 4 digit number be X.

X= 1 (mod 5)

X =2 (mod 5)

X=3 (mod 5)

X =4 (mod 5)

X=1+5 t where t is any integer.

1+5 t=2 (mod 5)

5 t=1 (mod 5 )

5 is the Modular Inverse of modulo 5

t=1 (mod 5)

t =1+5 u : u= any integer.

X becomes 1+ 5 (1+5u )=6+25 u

6+25u =3 (mod 5)

25 u= -3 (mod 5)=2 (mod 5)

25 is Modular Inverse of Modulo 5

u=2 (mod 5)

u =2+5 v : v= any integer.

X becomes 6 +25 (2+5 v)=56+125 v .

56 +125 v=4 (mod 5)

125 v=-52 (mod 5)=3 (mod 5)

125 is Modular Inverse of modulo 5

v = 3 (mod 5)

v =3 +5 w where w is any integer.

For lowest 4 digit number, take

w=200

X=1003 : Lowest 4 digit number.

Take w=201

X=208 : Next number.

For 4 digit largest number, take

w=1995

X= 9978 : Largest number.

No. of Numbers =(1995 - 200 )+1=1800 □Ans.

8 0
3 years ago
Read 2 more answers
Classify ABC by its sides. Then determine whether it is a right triangle.
m_a_m_a [10]

Answer:

∴Given Δ ABC is not a right-angle triangle

a= AB = √45 = 3√5

b = BC = 12

c = AC = √45 = 3√5

Step-by-step explanation:

Given vertices are A(3,3) and B(6,9)

            AB = \sqrt{x_{2}-x_{1} )^{2} +(y_{2}-y_{1} )^{2}  }

            AB = \sqrt{(9-3)^{2}+(6-3)^{2}  } = \sqrt{6^{2}+3^{2}  } =\sqrt{45}

Given vertices are  B(6,9) and C( 6,-3)

       B C = \sqrt{x_{2}-x_{1} )^{2} +(y_{2}-y_{1} )^{2}  }

             =  \sqrt{(-3-9)^{2}+(6-6)^{2}  } =\sqrt{12^{2} } = 12

    BC = 12

Given vertices are  A(3,3) and C( 6,-3)

 AC = \sqrt{(6-3)^{2}+(-3-3)^{2}  } = \sqrt{9+36} = \sqrt{45}

AC² = AB²+BC²

45  = 45+144

 45  ≠ 189

∴Given Δ ABC is not a right angle triangle

 

5 0
3 years ago
Function or no a function
marishachu [46]

Answer:

Not a function

Step-by-step explanation:

If it was a function there should be only one values for every x, in this case there is two values for x=0. Doesn't pass the vertical test.

7 0
3 years ago
Read 2 more answers
ok so i have to find how to get 5,13,3,6 to equal up to 12 u must use every number. please help asap!!! and please explain how u
anastassius [24]

Answer:

\frac{13-3}{5} *6=12

Step-by-step explanation:

13-3 = 10

10/5 = 2

2 x 6 = 12

6 0
3 years ago
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