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VMariaS [17]
3 years ago
5

How Do yo Do this equation 4-2y+3=-9

Mathematics
1 answer:
stiv31 [10]3 years ago
4 0

Answer:

y=8

Step-by-step explanation:

  1. 4-2y+3=-9
  2. 4+3-2y=-9
  3. 7-2y=-9
  4. 7-2y-7=-9-7
  5. -2y=-16
  6. -2y/-2=-16/-2
  7. y=8
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What is the value of b^2 - 4ac for the following equation<br><br> 2x^2 + 3x = -1
kicyunya [14]

Answer:

1

Step-by-step explanation:

We are finding the discriminant of the function

It needs to be written in the form  ax^2 +bx+c =0

2x^2 +3x = -1

Add 1 to each side

2x^2 +3x+1 = -1+1

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Logan genetically engineered a new type of fir tree and a new type of pine tree. The combined height of one fir tree and one pin
shepuryov [24]

Answer:

The types of trees that Logan genetically engineered are fir trees <u>9 meters</u> tall and pine trees <u>12 meters</u> tall.

Step-by-step explanation:

Given:

The combined height of one fir tree and one pine tree is 21 meters.

The height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.

Now, to find the height of types of trees that Logan genetically engineered.

<em>Let the height of fir tree be </em>x.<em />

<em>And let the height of pine tree be </em>y.<em />

So, the combined height of both the trees:

x+y=21\\\\x=21-y\ \ \ .....(1)

As given, the height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.

Thus,

4x=y+24

Now, substituting the value of x from equation (1):

4(21-y)=y+24

<em />84-4y=y+24<em />

<em>Subtracting both sides by 24 we get:</em>

<em />60-4y=y<em />

<em>Adding both sides by </em>4y<em> we get:</em>

<em />60=5y<em />

<em>Dividing both sides by 5 we get:</em>

12=y\\\\y=12\ meters.

<u>The height of pine trees = 12 meters.</u>

Now, substituting the value of y in equation to get the height of fir trees:

x=21-y\\\\x=21-12\\\\x=9\ meters.

<u>The height of fir trees = 9 meters.</u>

Therefore, the types of trees that Logan genetically engineered are fir trees 9 meters tall and pine trees 12 meters tall.

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3 years ago
i-Ready Which kind of triangle is shown? equilateral triangle acute triangle right triangle obtuse triangle​
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right triangle

Step-by-step explanation:

Notice it has a right angle (90º) in its corner. Therefore, it is a right triangle.

Right triangles look like this: ⊿

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