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zavuch27 [327]
3 years ago
7

Alex bought six books priced at $8 each. He got a discount of 20% off the total cost. How much did Alex pay for the books? Write

your answer up to two decimal places. Alex paid $? for the book?
Mathematics
1 answer:
irinina [24]3 years ago
8 0
Let us calculate the total cost first. Since each book costs 8$ and we have 6 books, we need to multiply 6 by 8 to get the total cost, hence 48$. We the need to calculate the reduction; 20% *48=9.6$. This is the reduction. To calculate the net cost, we need to subtract the reduction from the total cost. Hence, net cost= 48-9.6=38.4$
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Sandy is upgrading her internet service. Fast internet charges $60 for installation $50.45 per month. Quick internet has free in
Dvinal [7]
Fast internet : 60 + 50.45m
Quick internet : 57.95m

to find the number of months they would be equal....set them equal to each other and solve for m, the number of months

60 + 50.45m = 57.95m
60 = 57.95m - 50.45m
60 = 7.50m
60/7.50 = m
8 = m.....so they will be the same at 8 months


7 0
4 years ago
area of a triangle is 14x^5 + 63x^2. If the base is 7x^2, write an expression to represent the height ( x^2 means x square)
mr_godi [17]

Answer:

h=4x^3+18

Step-by-step explanation:

Given that,

The area of a triangle, A=14x^5 + 63x^2

Base, b=7x^2

We need to find the height of the triangle.

The formula for the area of the triangle is given by :

A=\dfrac{1}{2}\times b\times h\\\\\text{h is height}\\\\h=\dfrac{2A}{b}\\\\h=\dfrac{2\times (14x^5 + 63x^2)}{7x^2}\\\\h=\dfrac{2\times 7x^2(2x^3 + 9)}{7x^2}\\\\h=2(2x^3+9)\\\\=4x^3+18

So, the height of the triangle is 4x^3+18.

6 0
3 years ago
Part A: The sun produces 3.9 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 1
Elina [12.6K]

Answer:

Step-by-step explanation: 3.9  .  1033 per sec

1.55 . 107   .   and yes it can (i think ). ¯\_(ツ)_/¯

8 0
3 years ago
Read 2 more answers
What geometric shape is modeled by a stripe on a flag?
malfutka [58]
Answer:
Line segment
Explanation:
8 0
3 years ago
ASAP please help me
lesya692 [45]
So his lawn can be divided into 4 shapes: 1 rectangle, 2 triangles, and an irregular shape. So you get the area of the rectangle which is 48*120=5,760.

For the part above the rectangle, you can see that the 2 triangles and the irregular shape make one large triangle so take the area of that. (I’m going to refer to this as the BIG triangle).
.5*40*120=2,400
The base of the triangle is equal to the base of the rectangle. The height of the triangle you get by subtracting the height of the WHOLE lawn by the height of the rectangle. (88-48=40).

Inside that large triangle made up of three shapes, you can see another triangle that’s made up of one triangle and the irregular shape. I’ll refer to this triangle as triangle 1.
Take the area of that triangle.
.5*25*75=937.5
The base of the triangle you get by adding the base of the smaller triangle and the irregular shape. (51+24=75)

Inside the triangle you just took the area of (triangle 1) is another triangle (which I’ll refer to as triangle 2). Take the area of triangle 2.
.5*51*17=433.5

Subtract the area of triangle 1 by the area of triangle 2 and that’ll give you the area of the irregular shape.
937.5-433.5=504

So now you add the areas of the BIG triangle and the rectangle.
5760+2,400=8160
Make sure you subtract the irregular shape since it isn’t part of the lawn’s area.
8160-504=7656

So the lawn is 7656 square feet. Multiply it by .005. That equals 38.28. That’s how much fertilizer he needs to use.

Multiply 1.25 to 38.28 to get the amount of money he needs to spend.

47.85 dollars

I might’ve made a few mistakes but I hope my reasoning was at least understandable

7 0
3 years ago
Read 2 more answers
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