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serg [7]
2 years ago
9

9f+5(−8f+1)≤3f+7-10f+3f+7−10f

Mathematics
2 answers:
tatiyna2 years ago
4 0
F>-9/17. !!!!!!! I’m serious
_
Zepler [3.9K]2 years ago
3 0

Answer:

\boxed{f \leqslant  \frac{1}{5} }

Step-by-step explanation:

9f+5(−8f+1)≤3f+7-10f+3f+7−10f \to \\  \\ 31f  + 5 \leqslant  - 14f + 14 \\  \\ 45f \leqslant 9 \\ f \leqslant  \frac{9}{45}  \\  \boxed{f \leqslant  \frac{1}{5} }

♨Rage♨

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Problem in the picture
STatiana [176]

Answer:

B)

Step-by-step explanation:

65 x 2.5 = 162.5

70 x 1.5 = 105

162.5+105=267.5

7 0
3 years ago
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A line segment has endpoints A(4, 8) and B(2, 10). The point M is the midpoint of AB. What is an equation of a line perpendicula
Vera_Pavlovna [14]
I)

The Midpoint M of the line segment AB is found using the Midpoint formula:

M=( \frac{4+2}{2} , \frac{8+10}{2})=(3, 9)

ii)

the slope of the line through A and B is found by the slope formula:

m= \frac{y_1-y_2}{x_2-x_1}= \frac{10-8}{2-4}= \frac{2}{-2}=-1

iii)

the product of the slopes of 2 perpendicular lines is -1, so the slope of the line perpendicular to the line through A and B is -1/(-1)=1

iv) 

the equation of the line with slope 1, which contains point M(3, 9) is found by the slope point form equation of a line:

y-9=1(x-3)

y-9=x-3

y=x+6


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7 0
3 years ago
The perimeter of the big wheel of a bicycle is 9 cm longer than the perimeter of the front wheel. On the road of 120 cm, the big
beks73 [17]

Answer:

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Question

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A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. If the diameter of the wheel is 60cm, calculate the speed per hour with which the boy is cycling.

Easy

Solution

verified

Verified by Toppr

Radius of the wheel =r=

2

60

=30 cm

Circumference of the wheel =2πr=2×

7

22

×30=

7

1320

cm

Distance covered in 1 revolution =

7

1320

cm

Distance covered in 140 revolutions =

7

1320

×140=26400 cm=264 m=

1000

264

km

Distance covered in one minute = Distance covered in 140 revolutions =

1000

264

km

Distance covered in 1 hour =

1000

264

×60=15.84 km

Hence, the speed with which the boy is cycling is 15.84km/hr.

3 0
2 years ago
Please help me, ill give brainiest to correct answer
MAXImum [283]

Answer:

B.

Step-by-step explanation:

6 is left after crossing from end to end.

3 0
3 years ago
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snow_tiger [21]
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4 0
3 years ago
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