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mezya [45]
3 years ago
11

NEED HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Archy [21]3 years ago
5 0
Let the price of a bag of balloon=x     and  the price of a roll of crepe paper =y   
5x+2y=38
12x+14y=128
These are the equation you get from the question   
    5x+2y=38
  -5x        -5x         
     2y=38-5x       divide both side by 2           
     y=19-5/2x 
    
    12x+14y=128     plug in the y
   12x+14(19-5/2x)=128
   12x+266-35x=128    
   -23x+266=128
           -266  -266
       -23x=-138      divide both side by -23
           x=6   this will be the price of a bag of balloon 

    5x+2y=38     plug in x
    5(6)+2y=38
     30+2y=38
    -30       -30
        2y=8         divide both side by 2
         y=4          this will be the price of a roll of crepe paper 
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Francine applies the commutative property to the product. (−8/9)⋅(−13)⋅(18) Which expression illustrates the commutative propert
oksian1 [2.3K]

The commutative property implies that, the order of multiplication is not important.

(-\frac 89) \cdot (18) \cdot (-13) is true

Commutative property of multiplication states that:

If a \times b  = b \times a

The expression is given as:

(-\frac 89)\cdot (-13) \cdot (18)

To get the commutative expression, we simply change the position of each factor in the expression.

So, some possible equivalent expressions are:

(18) \cdot (-13) \cdot (-\frac 89)

(18)\cdot (-\frac 89) \cdot (-13)

(-13) \cdot (18) \cdot (-\frac 89)

There are several other equivalent expressions.

From the list of options;

(-\frac 89) \cdot (18) \cdot (-13) is true

Read more about commutative property at:

brainly.com/question/7037119

4 0
2 years ago
Read 2 more answers
Which of these statements is true for f(x) = (1/2)^x
Ann [662]
<h3>Answer:  D) The y intercept is (0,1)</h3>

This can be confirmed by plugging x = 0 into the function to find that...

y = (1/2)^x

y = (1/2)^0

y = 1

Recall that any nonzero value to the 0th power leads to 1. So we can say x^0 = 1 as long as x is not zero.

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

Extra info (optional section):

  • We can rule out choice A because negative x values work in the domain. For instance, if x = -1, then it leads to y = (1/2)^x = (1/2)^(-1) = 2. The negative exponent will apply the reciprocal operation to the base fraction.
  • Choice B can also be ruled out because the range is y > 0. Or you could note that it is possible to get positive y values smaller than 1/2. Try x = 2 and you'll see it leads to y = 1/4 which is not greater than 1/2.
  • Choice C is false as well. The function f(x) = (1/2)^x is decreasing throughout the domain. A graph visually would show this due to it going downhill when moving from left to right. A table of values is a non-visual way to see we have a decreasing function. The table would show that y decreases when x increases.
6 0
3 years ago
Read 2 more answers
Select the reason why these triangles are
Elden [556K]

Answer:

B. SAS

Step-by-step explanation:

In the given diagram, it would be observed that each side of the bigger triangle are multiplied by a factor of \frac{1}{3} to give the values of each corresponding sides of the smaller triangle. But the included angle of the two triangles are the same.

Therefore, the reason why the triangles are similar is because of side-angle-side (SAS) relations. The correct option is B.

4 0
3 years ago
1) The bakers at Healthy Bakery can make 290 bagels in 10 hours. How many
Ivenika [448]

Answer:

667 bagels in 23 hours

29 bagels per hour

Step-by-step explanation:

We first find the unit rate in bagels per hour.

(290 bagels) / (10 hours) = 29 bagels/hour

Now we find the number of bagels made in 23 hours.

23 hours * 29 bagels/hour = 667 bagels

8 0
3 years ago
Find the radius and diameter of a frisbee with a circumference of 11 pi inches.
nikdorinn [45]
Circumerence=2pir or dpi were r=radius and d=diameter
11pi=2pir
divid eobt sides by pi
11=2r
dvide 2
5.5=r

11pi=dpi
divide both sides by pi
11=d

diameter=11in
radius=5.5 in
6 0
4 years ago
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