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astraxan [27]
3 years ago
13

Which equation results from adding the equations in this system? 11 x minus 3 y = negative 17. Negative 4 x + 3 y = negative 18.

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
4 0

Answer:

7x = - 35

Step-by-step explanation:

Equation 1 :

11x - 3y = - 17

Equation 2 :

-4x + 3y = - 18

Equation 1 + 2

11x - 3y = - 17

-4x + 3y = - 18

_____________

11x - 4x - 3y + 3y = - 17 + (-18)

7x = - 35

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If a is directly proportional to b/2 and a=1 when b=10, what is the value of a when b=35
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The value of a would be 3.5, as a=1 when b=10 means that a is worth 1/10 of b's value. 
5 0
3 years ago
A bag contains 15 cups of sugar if 3/4 of a cup is needed for each batch of cookies what's the greatest number of batches of coo
tensa zangetsu [6.8K]

Answer:

20 batches

Step-by-step explanation:

Cups of sugar in a bag = 15

Cups of sugar per batch of cookie = 3/4 cup

Cups of sugar per batch of cookie : batch of cookies = 3/4 : 1

what's the greatest number of batches of cookies that can be made with the bag of sugar

Let

x = batches of cookies made with a bag of sugar

Cups of sugar per batch of cookie : batch of cookies = 15 : x

Equate the ratios

3/4 : 1 = 15 : x

3/4 ÷ 1 = 15/x

3/4 × 1/1 = 15/x

3/4 = 15/x

Cross product

3 * x = 4 * 15

3x = 60

x = 60/3

x = 20

x = batches of cookies made with a bag of sugar = 20 batches

8 0
3 years ago
If the area of a rectangular garden is 45x2−12x square meters, and it has a length of 3x meters, what is its width?
nikitadnepr [17]

Answer:

  (9x -4) meters

Step-by-step explanation:

The relationship between area, length, and width is ...

  area = length × width

Dividing by length gives ...

  width = area/length

Filling in the given expressions, we have ...

  w=\dfrac{45x^2-12x}{3x}=\dfrac{45x^2}{3x}-\dfrac{12x}{3x}=9x-4

The width of the garden is 9x-4 meters.

4 0
3 years ago
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John will spend time with about 8 kids all together, if you just subtract the amount of kids from each section. you will get it
7 0
3 years ago
Find the value of x. Give your answer in simplest radical form.
yarga [219]
Using the pythagoras theorem for a right-angled triangle:-

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8 0
2 years ago
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