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4 years ago

Solve x-2y=4 for y in terms of x

Mathematics

1 answer:

vazorg [7]4 years ago

3 0

Y= 1/2x-2
sybtract x from left to right
divide both side by -2

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Kayla and he children went into a restaurant and she bought $63 worth of hotdogs and tacos. Each hotdog costs $3.50 and each tac

Diano4ka-milaya [45]

Answer:

Kayla bought 7 tacos and 10 hotdogs

Step-by-step explanation:

Let the number of hotdogs be x.

Let the number of tacos be y.

i) It is given that x = y + 3

ii) It is also given that 3.5x + 4y = 63, therefore 7x + 8y = 126

iii) substituting the value of x from i) in ii) we get 7(y + 3) + 8y = 126

therefore 15y + 21 = 126

therefore 15y = 105

therefore y = 7

Therfore Kayla bought 7 tacos

iv) Using the value of y from iii) in i) we x = 7 + 3 = 10

Therefore Kayla bought 10 hotdogs

6 0

3 years ago

Evaluate 12x−3y when x=−14 and y=3

Amiraneli [1.4K]

12x - 3y

12(-14) - 3(3)

-168 + 9

-159

Hope this helps!! :)

4 0

3 years ago

Read 2 more answers

Suppose x and y vary together such that y = 2 x + 11 . Suppose x varies from x = 2 to x = 8.5 .

Stells [14]

Answer:

a) x changes by 6.5 units

b) y changes by 13 units

Step-by-step explanation:

a. Over this interval, how much does x change by?

Initially, we have that x = 2.

In the end, we have that x = 8.5.

So x changes by 8.5-2 = 6.5 units

b. Over this interval, how much does y change by?

Initially, when x = 2, we have that y = 2x + 11 = 2*2 + 11 = 15

In the end, when x = 8.5, we have that y = 2*8.5 + 11 = 28

So y changes by 28 - 15 = 13 units

8 0

3 years ago

HELP FAST I WILL MARK AS BRAINLIEST.

vodka [1.7K]

Answer:

s = 1/3(a + b + c + 16)

Step-by-step explanation:

<h3>Given</h3>

If (s -a) = 5cm, (s -b) = 10cm, (s -c) = 1cm
s = ?

<h3>Solution</h3>

<u>Add up the 3 equations and solve for s:</u>

s - a + s - b + s - c = 5 + 10 + 1
3s = 16 + a + b + c
s = 1/3(a + b + c + 16)

7 0

3 years ago

Samantha is making flower arrangements. She has 32 roses and 96 daisies. If she wants to make all the arrangements identical and

-Dominant- [34]

Answer:

3 daisies.

Step-by-step explanation:

Given that,

Samantha has 32 roses and 96 daisies.

She wants to make all the arrangements identical and have no flowers left over. We need to find the no of daisies in each flower arrangement.

For this, we need to first find the HCF of 32 and 96.

The factors of 32 are: 1, 2, 4, 8, 16, 32

The factors of 96 are: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96

HCF = 32

No of daisies = 96/32 = 3

Hence, there are 3 daisies in each flower arrangement.

7 0

3 years ago