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aleksklad [387]
2 years ago
11

Simplify

Mathematics
1 answer:
IRINA_888 [86]2 years ago
3 0

Answer:

Final answer is  ---> -4

Step-by-step explanation:

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Jan bought 6 cookies and 4 doughnuts for 3.50. Tom bought 12 cookies and 5 doughnuts got 5.23. Write and solve a system of equat
iren2701 [21]
0.19 for one cookie and 0.59 for one doughnut

x for how much one cookie costs and y for how much one doughnut costs
6x+4y=3.5
12x+5y=5.23

solve by substitution: (elimination would work too)
4y=3.5-6x
y=0.875-1.5x
12x+5(0.875-1.5x)=5.23
12x+4.375x-7.5x=5.23
4.5x=0.855
x=0.19
now use x to solve for y:
6(0.19)+4y=3.5
1.14+4y=3.5
2.36=4y
y=0.59

Check the work: 6(0.19)+4(0.59)=3.5
4 0
3 years ago
3. Is the relation {(1,2), (3, 10), (2,8), (5,<br> 10)} a function?<br> a) yes<br> b) no<br> a
Sedaia [141]

Answer:

the answer is yes

Step-by-step explanation:

4 0
2 years ago
Solve for x. Assume that lines which appear to be diameters are actually diameters​
Dafna1 [17]

Answer: number 7. 7

Step-by-step explanation:

Simplifying

7X + 1 + -5X = 15

Reorder the terms:

1 + 7X + -5X = 15

Combine like terms: 7X + -5X = 2X

1 + 2X = 15

Solving

1 + 2X = 15

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-1' to each side of the equation.

1 + -1 + 2X = 15 + -1

Combine like terms: 1 + -1 = 0

0 + 2X = 15 + -1

2X = 15 + -1

Combine like terms: 15 + -1 = 14

2X = 14

Divide each side by '2'.

X = 7

Simplifying

X = 7

4 0
3 years ago
How many times does 4 go into 24
il63 [147K]

Answer:6

4 multiplied by 6 is 24 so 6 is the answer

4 0
2 years ago
Read 2 more answers
Water evaporates from a pond at aa rate of 0.005 inches per hour. What is the change in the water level of the pond after 24 hou
Eduardwww [97]

Answer:

Water level after 24 hours will be \frac{3}{25}\ inches.

Step-by-step explanation:

Given:

Evaporate rate of water= 0.005 inches per hour.

We need to find the level of water after 24 hours.

now we know the in 1 hour the water evaporates from a pool at a rate of 0.005 inches.

So To find the water level after 24 hrs we will multiply the evaporation rate with total number of hours which is 24 and the divide by 1 hour we get.

Framing in equation form we get;

water level after 24 hrs = \frac{24 \times 0.005}1 = 0.12\ inches

Now to convert the number in rational form we have to multiply and divide the number by 100 we get;

\frac{0.12\times 100}{100} = \frac{12}{100}=\frac{3}{25}\ inches

Hence Water level after 24 hours will be \frac{3}{25}\ inches.

5 0
3 years ago
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