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2 years ago

If 18 is subtracted from twice the square of an integer, the

Mathematics

1 answer:

kherson [118]2 years ago

6 0

Answer:

-3/2

Step-by-step explanation:

Let x = the integer:

2x^2 - 18 = 9x

2x^2 - 9x - 18 = 0

Now either factor that or use the quadratic formula if you're lazy like me.

x = -3/2 and 6, so x must be 6 because it has to be an integer.

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(7/8) (x) = -2/3<br><br> What is the value of x?

Gwar [14]

Remember
a/b time b/a=1

find 1x
(7/8)x=-2/3

multiply both sides by 8/7 to clea fraction
1x=-16/21

4 0

2 years ago

Fill in the two missing boxes?

guapka [62]

Answer:

Step-by-step explanation:

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5 0

2 years ago

Write a conditional that multiplies the value of the variable pay by one-and-a-half if the value of the boolean variable workedo

guajiro [1.7K]

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6 0

3 years ago

Help me plz it’s hard for me lol

slava [35]

Answer:

Step-by-step explanation:

2 *3 sqare root 3 * 12

Solving gives:

6 sqare root 36.

sqare root 36 = 6

2 * 6 * 3

So our answer is 36.

3 0

2 years ago

Michael can buy 4 sandwiches and 3 cups of coffee for $23.75. Amy can buy 2 sandwhiches and 5 cups of coffee for $19.75 how much

Kobotan [32]

Answer: The cost of one sandwich is $4.25 and the cost of one cup of coffee is $2.25.

Step-by-step explanation:

Let x be the cost of one sandwich and y be the cost of one cup of coffee.

By considering the given situation, we have the following equations :-

$4x+3y=23.75.................(1)\\\\2x+5y=19.75................(2)$

Multiply 2 on both sides of equation (2) , we get

$4x+10y=39.5................(3)$

Subtract equation (1) from equation (3), we get

$7y=15.75\\\\\Rightarrow\ y=\dfrac{15.75}{7}=2.25$

Put value of y in (1), we get

$4x+3(2.25)=23.75\\\\\Rightarrow\ 4x+6.75=23.75\\\\\Rightarrow\ 4x =17\\\\\Rightarrow\ x=4.25$

Hence, the cost of one sandwich is $4.25 and the cost of one cup of coffee is $2.25.

8 0

2 years ago