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umka2103 [35]
3 years ago
12

A park has a grinkgo tree a dogwood tree and 2 blue spruce trees the blue spruce trees are 8 years old the grinkgo tree is 2 yea

rs less than three times the age of the dogwood tree the grinkgo tree is also half the sum of the ages of the dogwood tree and both if the blue spruce trees write and solve an equation to find the ages of the grinkgo and the dogwood trees.
Mathematics
1 answer:
enot [183]3 years ago
7 0

Answer:

The age of the grinkgo tree is 10 years old and the age of the dogwood tree is 4 years old

Step-by-step explanation:

Let

x -----> the age of the grinkgo tree

y -----> the age of the dogwood tree

z -----> the age of the blue spruce tree

we know that

x=3y-2 ------> equation A

z=8 ----> equation B

x=\frac{1}{2}(y+2z)

substitute the value of z

x=\frac{1}{2}(y+2(8))

x=\frac{1}{2}(y+16) -----> equation C

equate equation A and equation C and solve for y

3y-2=\frac{1}{2}(y+16)

6y-4=(y+16)

6y-y=16+4

5y=20

y=4

Find the value of x (equation A or equation C)

x=3(4)-2=10

therefore

The age of the grinkgo tree is 10 years old and the age of the dogwood tree is 4 years old

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Rudik [331]
Store A :
0.90(45) = 40.50......40.50 + .06(40.50) = 40.50 + 2.43 = 42.93

store B :
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she would have to purchase the rug from store B...because she doesn't have enough money to purchase it from store A. She would have (40 - 38.16) = $ 1.84 in change.

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3 years ago
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JulsSmile [24]

The solution points to the system graph are (–2,–4) and (4,8). Therefore, option A is correct.

We need to find the solution to the given function.

<h3>How to find the solution to the function from the graph?</h3>

The solution of such a system is the ordered pair that is a solution to both equations. To solve a system of linear equations graphically we graph both equations in the same coordinate system. The solution to the system will be at the point where the two lines intersect.

From the given graph we can see that the two functions are intersecting at (–2,–4) and (4,8).

The solution points to the system graph are (–2,–4) and (4,8). Therefore, option A is correct.

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tatyana61 [14]

Answer:

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Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

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2/5 is incorrect because 2 is first. That means that this ratio would be 2 to 5, not 5 to 2.

4 0
3 years ago
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