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prohojiy [21]
3 years ago
7

A store sells hardcover books for $8 and paperback books for $5. You buy 7 books, represented by the equation x + y = 7, where x

is the number of hardcover books and y is the number of paperback books. The equation 8x + 5y = 44 represents the total cost. How many of each type of book did you buy?
I will give brainliest Pleaseee help
Mathematics
1 answer:
Lina20 [59]3 years ago
3 0

Answer:

x=3

y=4

Step-by-step explanation:

By moving x to the right-hand side of the first equation we get y=-x+7, which we then substitute for y in the second equation. Solving gives x=3, which we can then put into the first equation and get y=4.

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According to the graph, for which values of x is y always negative?
Savatey [412]

Answer:

3rd option

Step-by-step explanation:

y is negative below the x- axis , that is for values of x in the interval

x > - 6 and x < 6

4 0
2 years ago
Find the median of the following set of numbers:<br> 3,12,4,6,8,5,4
natulia [17]

Answer:

el 5

Step-by-step explanation:

La mediana es el número intermedio de un grupo de números; es decir, la mitad de los números

Primero se acomodan de menor a mayor y luego ubicaras  el número que queda en medio

6 0
3 years ago
Can someone can help me solve this inequality?
12345 [234]

Answer:

b < -10  and  (-∞, -10)

Step-by-step explanation:

I won't draw the number line but I will do the interval notation.

Interval notation is a way to describe infinite or finite sets with numbers.

To solve the inequality first add 2 to both sides to get:

-b > 10 Multiply both sides by -1:

b < -10 is the simplification of the inequality .

Now to write this in interval notation you need to know which direction the values are increasing, since b is less than -10, the values are going down starting from -10 (not including -10).

Interval notation: (-∞, -10)

6 0
3 years ago
What is the remainder and quotient of 90 8765 when divided by 97​
GREYUIT [131]

Answer:

71134

Step-by-step explanation:

4 0
3 years ago
Pls pls pls help for points
stepladder [879]

Answer:

see below

Step-by-step explanation:

g(x) = (x+2)^2 -1

The function is in the form

g(x) = a(x-h)^2 +k

where (h,k) is the vertex of the parabola

Rewriting

g(x) = (x+2)^2 -1

      = (x--2)^2 + -1

      The vertex is (-2,-1)

We can find another point by letting x =0

g(0) = (0+2)^2 -1

      =2^2 -1

      =4-1 =3

The second point is (0,3)

7 0
3 years ago
Read 2 more answers
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