MATHEMATICS MIDDLE SCHOOL

Hannah has a grid of squares that had 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the grid blue. She colors the rest of the squares red. How many squares does Hannah color red?

Answers

Answer 1

Answer:

there's a grid of squares with 12 rows and in each row there are 15 squares

from this grid she colours 8 squares from each row for 5 rows blue.

the rest of the squares she colours red

so first we have to find how many squares are there in the grid in total

so if each row has 15 squares

then 12 rows have - 15 x 12 = 180 squares

blue coloured squares

she colours 8 rows of 5 squares

so if 1 row has - 5 squares

then 8 rows have - 5 x 8 = 40 squares

from 180 squares, she colours 40 squares blue and the rest red colour

therefore the squares she colours red are

red squares = 180 - 40 = 140 squares

she colours 140 squares red

Answer 2

Answer: WORK:
12 rows of 15 squares = 12 × 15 = 180 squares
5 rows of 8 squares = 5 × 8 = 40 squares
180 squares - 40 squares = 140 squares
ANSWER:
Hannah colors 140 squares red.

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A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks.Number of pages 50 100 150 200
Cost 1.55 2.25 2.95 3.65

Which equation gives the cost, y, in terms of the number of pages, x?

A.

y = 0.014x + 49.15

B.

y = 0.014x + 1.55

C.

y = 0.014x + 0.85

D.

y = 58.8x + 0.85

Answers

so y=mx+b

cost=m(number of pages)+b

cost=y
# of pages=x

so points are
(x,y)
(50,1.55)
(100,2.25)
(150,2.95)
(20,3.65)

so solve for slope/m you do (y₁-y₂)/(x₁-x₂) so
just use any for example
(1.55-2.25)/(50-100)=-0.70/-50=1 times 0.7/50=7/500= (to convet to decimal form) 14/1000=1.4/100=0.14/10=0.014/1=0.014

slpoe is 0.014

y=0.014x+b

input one of the points exg 50 for x and 1.55 for y and solve for b
1.55=0.014(50)+b
1.55=.7+b
subtract .7 from both sides
0.85=b

so the equation is
y=0.014x+0.85

which is C

The bases of a trapezoid are 11 meters and 14 meters .Its height is 10 meters . What is the area of the trapezoid ??

Answers

Given:
Bases of trapezoid : 11 meters and 14 meters
height of trapezoid : 10 meters

Area of trapezoid = (sum of bases / 2) height
A = (11m + 14m)/2 * 10m
A = 25m / 2 * 10m
A = 12.5m * 10m
A = 125m²

Just multiply 14×10=140×11=280. The area of the trapezoid is 280 meters

Layla wrote a report about insects. She listed the lengths of the tiger beetles, carpenter ants , and aphids . The lengths were 1/2 inch,5/8 inch, and 1/8 inch. a tiger beetle is bigger than carpenter ant. a carpenter ant is bigger than aphid. list the sizes of each insect.

Answers

the sizes are as following:

tiger beetle: 5/8

carpenter ant: 1/2

aphid: 1/8

a large pizza has eight equal slices and costs "x" dollars. write an algebraic expression for the cost (in dollars) of each slice of pizza. a) 8 x b) x + 8 c) x 8 d) 8 x