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Mariulka [41]
3 years ago
8

Find the value of:(a) 5x3 + x2 - 10x when x = 2​

Mathematics
2 answers:
Flauer [41]3 years ago
7 0

Answer:

5*2*3+2*2-10*2

30+4-20

34-20

=4

kherson [118]3 years ago
7 0

Step-by-step explanation:

Here's the answer I hope it will help u

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IF THE TRIANGLES IN THE ABOVE FIGURE ARE PROPORTIONAL, WHATS THE LENGTH OF SIDE B?
Tema [17]
<h3>Answer: choice B) 36</h3>

=================================================

Explanation:

The vertical sides, when read from left to right, can be divided to get this fraction: 9/90

Following the same order and direction, we divide the slanting corresponding sides to get: b/360

The fractions we constructed are equal to one another, as the triangles are said to be proportional.

We have the fraction 9/90 = b/360

Lets cross multiply and solve for b

--------------------

9/90 = b/360

9*360 = 90*b

3240 = 90b

90b = 3240

90b/90 = 3240/90

<h3>b = 36</h3>

--------------------

A quick way to do this may be to notice how the jump from 9 to 90 is "times 10" so the jump from b to 360 is also "times 10". Think in reverse to divide 360 over 10 and we land on 36 as our answer. This line of thinking does not work as simple for all proportional problems.

5 0
3 years ago
Helpppppp fastttttttttt
crimeas [40]

Answer:

d

Step-by-step explanation:

8 0
2 years ago
A rectangle length is 8cm more than three times it’s widith. The perimeter is 128 cm find the length.
Masteriza [31]
Let x = width
<span>length is 8 cm more than three times it’s width so length = 3x + 8
</span>
Perimeter of a rectangle = 2(L + W)
so
128 = 2(x + 3x + 8) solve for x (width)
128 = 2(4x + 8)
  64 = 4x + 8
  4x = 56
    x = 14
width = 14 cm
length = 3(14) + 8 = 50 cm

Answer:
width   = 14 cm
length  = 50 cm

4 0
3 years ago
I Need Help Plzzzzz!!!!
zimovet [89]

Answer:

D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
2 Points
Nesterboy [21]

Answer:105

Step-by-step explanation:55-66=74 74times

3 0
2 years ago
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