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Harrizon [31]
3 years ago
11

Which of the following systems of linear equations has no solution?

Mathematics
2 answers:
mrs_skeptik [129]3 years ago
5 0

Answer:

C?

Step-by-step explanation:

Because there is no x I think.

salantis [7]3 years ago
3 0
The third one because both are y equations i think
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Please help. Here's the question
kakasveta [241]
He goes 1.5k/h. To get that you divide the km by the hour. Then multiply the hour by 1.5 to get the km. (Ex. 2hrs x 1.5km = 3km)
6 0
2 years ago
What is the value of 7x-9y when x=1 and y=8?
julsineya [31]
It would be - 65

7 x 1 = 7
9 x 8 = 72

7 - 72 = - 65

hope this helps you
4 0
3 years ago
Read 2 more answers
an open rectangular cardboard box with a square base is to have a volume of 256cm^3. Find the dimensions of the box if the area
Anit [1.1K]
Let
x------> the length side of the square base of the box
y-------> the height of the box

we know that
volume of the box=b²*h
b=x
h=y
volume=256 cm³
so
256=x²*y------>y=256/x²-------->  equation 1

<span>The amount of material used is directly proportional to the surface area, so we will minimize the amount of material by minimizing the surface area.</span>

surface area of the cardboard=area of the base+perimeter of base*height
area of the base=x²
perimeter of the base=4*x
height=y
surface area=x²+4x*y-----> equation 2
substitute equation 1 in equation 2
SA=x²+4x*[256/x²]-----> SA=x²+1024/x

step 1 
find the first derivative of SA and equate to zero
2x+1024*(-1)/x²=0------> 2x=1024/x²----> x³=512--------> x=8 cm
y=256/x²------> y=256/8²-----> y=4 cm

the answer is
the length side of the square base of the box is 8 cm
the height of the box is 4 cm

5 0
3 years ago
Chester has less than $25 to spend at the county fair. The entrance fee is $5, and each ride costs $3. The number of rides, r, t
padilas [110]

Answer:

6 rides

Step-by-step explanation:

3r+5<25

3r<20

r<6.67

rides=6

check answer

3r+5<25

3(6)+5<25

18+5<25

23<25

4 0
3 years ago
The O'Niell family decided to book a hotel for a trip to Orlando, FL from Saturday 6/3 through Friday 6/9. They decide to stay a
Citrus2011 [14]
Six nights.

1. Saturday night
2. Sunday night
3. Monday night
4. Tuesday night
5. Wednesday night
6. Thursday night
8 0
3 years ago
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