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nadya68 [22]
3 years ago
9

How do you solve the equation 0.4(2x+0.5)=3[0.2x+(-2)]-4

Mathematics
2 answers:
dusya [7]3 years ago
6 0
 <span>0.4(2x+0.5)=3[0.2x+(-2)]-4 
</span>
 <span>0.8x+0.2=0.6x-6-4 </span> 
<span>
0.8x-0.6x=-6-4-0.2 
</span>
 <span>0.2x=-10.2 </span> 
<span>
x=-10.2/0.2 
</span>
 <span>x=-51</span>
sergey [27]3 years ago
6 0
0.4(2x+0.5)=3[0.2x+(-2)]-4<span>

</span>0.8x+0.2=0.6x-10

0.2x=-10.2

x= \frac{-10.2}{0.2}

x=-51
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8 0
3 years ago
Read 2 more answers
A blue jay lives in a nest that is 12 meters high in a tree the blue jay flies 15 meters to get from its nest to a flower on the
Ivan

Answer:

The distance between the base of the tree and the flower is 9m

Step-by-step explanation:

Here, we have to paint a picture.

The flower is on the ground, the height of the tree is 12m.

The distance from the nest to the flower on the floor is 15m

Indisputably, what we have is a right angled triangle, with the height being 12m, the length of the hypotenuse being 15 and we are asked to calculate the adjacent which represents the distance from the base of the tree to the flower

To get this distance, we simply apply the Pythagoras’ theorem which states that the square of the hypotenuse(longest side of the triangle) is equal to the sum of the squares of the other two sides.

Thus mathematically, we know that our hypotenuse is 15m and the height is 12m

The length we are to calculate is the adjacent and it is equal to;

15^2 - 12^2

= 225 - 144

= 81

The length is thus

√(81) = 9m

Please check attachment for a diagrammatic picture of the triangle

8 0
3 years ago
In a hospital there are 56 TB patients. The patients are grouped with respect to their ages.
zalisa [80]
<span>Table:

Class Boundaries         Frequency

5-10                              8

10-15                            9

15-20                          15

20-25                          10

25-30                           8

30-35                           6
                                ----------
total                           56

Average =

[5+10]/2*8+[10+15]/2*9+[15+20]/2*15+[20+25]/2*10+[25+30]/2*8+[30+35]/2*6
---------------------------------------------------------------------------------------------------
</span>                                                      56

That is 1075 / 56 = 19.2

Answer: 19

5 0
3 years ago
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9514 1404 393

Answer:

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Step-by-step explanation:

The graph shows the marlin travels 50 miles in 1 hour, and 150 miles in 3 hours. These numbers can be compared directly to those given for the tuna (43.5 miles in 1 hour) and the wahoo fish (144 miles in 3 hours).

The speeds of the swordfish and shark are the coefficients of x in their respective equations. The swordfish travels 60 mph, so is faster than the marlin. The shark travels 31 mph, so is slower.

7 0
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If a piece of sea floor moved 50km in 5 million years what is the yearly rate in motion
Zanzabum

The answer is 100,00 km per year
6 0
3 years ago
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