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melisa1 [442]
3 years ago
9

Does anyone know what this is?

Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Turn them into linear equation.

4y + x = -17

     -x     -x

4y = -x - 17

---   ----   ---

4     4      4

y = -1/4x - 17/4

-2y + 2x = 16

      -2x   -2x

-2y = -2x + 16

-----    ----   -----

-2        -2     -2

y = 1x - 8

Solve for x.

-1/4x - 17/4 = 1x - 8

+1/4x           +1/4x  

-17/4 = 5/4x - 8

+8                +8

15/4 = 5/4x

------     -----

5/4      5/4

3 = x

Check:

-1/4(3) - 17/4 = 1(3) - 8

-3/4 - 17/4 = 3 - 8

-5 = -5

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Nolan and his children went into a grocery store and he bought $8 worth of apples
goldfiish [28.3K]

Nolan and his children bought fruits (Apples and bananas) worth $8.

Cost of each apple and bananas are $2 and $0.40 respectively.

Let the number of bananas he bought = y

And the number of apples = x

Therefore, cost of the apples =$2x

And the cost of bananas = $0.40y

Total cost of 'x' apples and 'y' bananas = $(2x + 0.40y)

Equation representing the total cost of fruits will be,

(2x + 0.40y) = 8

10(2x + 0.40y) = 10(8)

20x + 4y = 80

5x + y = 20 --------(1)

If he bought 5 times as many bananas as apples,

y = 5x ------(2)

Substitute the value of y from equation (2) to equation (1),

5x + 5x = 20

10x = 20

x = 2

Substitute the value of 'x' in equation (2)

y = 5(2)

y = 10

Therefore, Nolan bought 2 apples and 10 bananas.

Learn more,

brainly.com/question/14951851

8 0
2 years ago
I am confused with everything
notsponge [240]
I think it's x^3+2x^2-4
5 0
2 years ago
The Jurassic Zoo charges $13 for each adult admission and $4 for each child . The total bill for the 238 people from a school tr
slava [35]

Answer:

42 adults and 196 children went to the zoo

Step-by-step explanation:

Let

x ----> the number of adults

y ----> the number of children

we know that

The total bill for the 238 people from a school trip was $1330

so

x+y=238 ----> equation A

13x+4y=1,330 ----> equation B

Solve the system of equations by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

the solution is the point (42,196)

see the attached figure

therefore

42 adults and 196 children went to the zoo

6 0
3 years ago
Which property is illustrated by the following statement? If HAX RIG, then RIG HAX. A. Symmetric B. Transitive C. Reflexive D. D
Alex_Xolod [135]
<span>If HAX RIG, then RIG HAX. A. Symmetric</span>
3 0
3 years ago
Read 2 more answers
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shutvik [7]
X=8.6 since you have to divide -4.3 by -0.5
7 0
2 years ago
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