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faust18 [17]
3 years ago
7

Can u help me with no 38

Mathematics
2 answers:
QveST [7]3 years ago
4 0
40*3 = 120
120+40 = 160

Yes you are correct! because the answer is $160

Hope this helps! :)
aliya0001 [1]3 years ago
3 0
Determine single-digit values of M for which the products M*5 end in 5.  They are M={1,3,5,7, ...}.  Note, for example, that 7*M5 ends in 5, the last digit of 385.  Even values of M (as in {2,4,6,8,...} do not have products that end in 5, and thus must be eliminated.

Next, note that if N=5, then M*5 becomes 75, and that 75 multiplied by 5 comes out to 385, which is the desired product.  

Noting that L times N*5 (that is, L times 55) = 385, L has to be the same as M, and is in fact 7.  Then L times N*5 comes out to 385.

In summary:  N=5, M=7 and L=7.
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one strand of lights for a Christmas tree 250 light bulbs. If 20% of the light bulbs are green how many light bulbs on the stran
Nadusha1986 [10]

Answer:

20% of 250 is 50

6 0
2 years ago
Lisa's dog has 4 squeaky toys. Two thirds of the dog's toys are squeaky toys. How many dog toys does Lisa's have in all?
viva [34]
.  Lisa's dog has 4 squeaky toys   
.  the squeaky toys are 2/3 of all the dog's toys

.  let <em>x</em> be number of all dog toys

<em>make an equation</em>
(2/3)<em>x</em> = 4   <em>← solve</em>
x=6

<em>check</em>
2/3 × 6 = 4

<u>Lisa's Dog has 6 toys in all</u>



3 0
3 years ago
Which expression has the greatest value<br> when x = 3<br> 223<br> 2x3 +5<br> (2x)<br> (x - 1)3
Olenka [21]

Answer:

2x {}^{2}  + 5

4 0
2 years ago
A rectangle is constructed with its base on the​ x-axis and two of its vertices on the parabola y equals = 100 100 minus −x squa
masha68 [24]

Answer:

Step-by-step explanation:

Given that a rectangle is constructed with its base on the x axis and two of its vertices on the parabola

y=100-x^2

This parabola has vertex at (0,100) and symmetrical about y axis.

Any general point above x axis can be written as (a,b) (-a,b) since symmetrical about yaxis.  

Hence coordinates of any rectangle are

(a,0) (-a,0), (a, 100-a^2), (-a, 100-a^2)

Length of rectangle = 2a and width = 100-a^2

Area of rectangle = lw = 2a(100-a^2)=200a-400a^3

To find max area, use derivative test.

A' = 200-800a^2\\A"=-1600a

Hence maxima when first derivative =0

i.e. when a =2

Thus we find dimensions of the rectangle are l =4 and w = 96

Maximum area = 4(96) = 384

5 0
3 years ago
The figure shows a parallelogram inside a rectangle outline: A parallelogram is shown within a rectangle. The length of the rect
Dominik [7]

Answer=5/16 or 0.3125 feet

Step-by-step explanation:

7 0
3 years ago
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