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denis23 [38]
3 years ago
13

rebecca purchased a total of 17 books and toys for the woodbine play school. each book cost 6 dollars and each toy costs 11 doll

ar. how many book and toys did she buy for $152
Mathematics
1 answer:
DochEvi [55]3 years ago
8 0
Let x= the number of books purchased: 7 books purchased  
let y = the number of toys purchased;10 toys purchased  
Equations: x+y=17
                 6x+11y=152             x+10=17
-6(x+y=17)          y=10                  -10  -10
                                                    ------------
-6x-6y=-102                                     x=7
6x+11y=152
--------------------
0x+5y=50
     ----  ----
      5     5
You might be interested in
What is the type of conic section given by the equation x^2 - 9y^2 = 900 and what is the domain and range?
Valentin [98]
A conic section is a curve obtained by the intersection of the surface of a cone with a plane. A conic section can be a circle, a hyperbola, a parabola, and an ellipse.

For a circle, the general equation of a circle with center, (a, b), and a radius, r, is of the form
(x-a)^2+(y-b)^2=r^2

For a hyperbola, the general equation of a hyperbola with center (h, k), and a and b half the lengths of the major and the minor axis respectively is of the form.
\frac{(x-h)^2}{a^2} - \frac{(y-k)^2}{b^2} =1

For a parabola, the general equation of a parabola with center (h, k), and a multiplier a is of the form
y-k=a(x-h)^2

For an ellipse, the general equation of an ellipse with center (h, k), and a and b half the lengths of the major and the minor axis respectively.
\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2} =1

Given the equation
x^2-9y^2=900
It can be rewritten as
\frac{(x-0)^2}{900} - \frac{(y-0)^2}{100} =1 \\  \\ \frac{(x-0)^2}{30^2} - \frac{(y-0)^2}{10^2} =1
This gives an equation of a hyperbola with center (0, 0), half the length of the major axis = 30 and half the length of the minor segment = 10.

The domain of the equation is all real values of x.
8 0
3 years ago
Which product is positive?
Temka [501]

Answer:

3

Step-by-step explanation:

all same signs means positive

7 0
2 years ago
How do I do this?? Help plse!
eimsori [14]
D, it is the correct answer
6 0
3 years ago
-2(7a+4b)-6c=<br> Simplify
jeka94

Answer:

Because of the minus sign

2 becomes - 2

The answer is -2

Multiply a and 7

Multiply a and 1

The a just gets copied along.

The answer is a

a

7*a evaluates to 7a

Multiply b and 4

Multiply b and 1

The b just gets copied along.

The answer is b

b

4*b evaluates to 4b

7*a+4*b evaluates to 7a+4b

Multiply -2 by 7a+4b

we multiply -2 by each term in 7a+4b term by term.

This is the distributive property of multiplication.

Multiply -2 and 7a

Multiply 1 and a

The a just gets copied along.

a

-2 × 7a = -14a

Multiply -2 and 4b

Multiply 1 and b

The b just gets copied along.

b

-2 × 4b = -8b

-2*(7*a+4*b) evaluates to -14a-8b

Multiply c and 6

Multiply c and 1

The c just gets copied along.

The answer is c

c

6*c evaluates to 6c

The answer is -14a-8b-6c

-2*(7*a+4*b)-6*c evaluates to -14a-8b-6c

The final answer is

-14a-8b-6c

Step-by-step explanation:

Please mark brainliest and have a great day!

4 0
3 years ago
Anyone know the answer I’m lost…
Artist 52 [7]

Answer:

#1: -1

#2: 1

Step-by-step explanation:

Anything raised to  the 0 power is 1, but in question 1 the negative is outside the parenthesis, so it makes it -1.

5 0
2 years ago
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