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Akimi4 [234]
4 years ago
6

Solve the equation, x^2+3x+1=0, using the quadratic formula.

Mathematics
1 answer:
kari74 [83]4 years ago
7 0

Answer:

x = (-3±√5)/2

Step-by-step explanation:

Matching the given equation to the pattern ...

... ax² +bx +c = 0

we see that a=1, b=3, c=1.

The solution to the above pattern is given by the quadratic formula ...

... x = (-b±√(b²-4ac))/(2a)

Substituting the values of a, b, c that we found, the formula gives ...

... x = (-3±√(3²-4·1·1))/(2·1)

... x = (-3±√5)/2

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Farmer Theresa's Produce Stand sells 27.5 lbs. bags of mixed nuts that contain 44% peanuts. To make her product she combines Bra
masya89 [10]

Answer:

Theresa needs 14.3 pounds of Brand A mixed nuts and 13.2 pounds of Brand B mixed nuts.

Step-by-step explanation:

Let A represent the brand A mixed nuts and B represent Brand B mixed nuts.

We have been given that farmer Theresa's Produce Stand sells 27.5 lbs. bags. We can represent this information in an equation as:

A+B=27.5...(1)

We are also told that to make her product she combines Brand A mixed nuts which contain 20% peanuts and Brand B mixed nuts which contain 70% peanuts.

We can represent this information in an expression as:

0.20A+0.70B

Since the stand sells 27.5 lbs. bags of mixed nuts that contain 44% peanuts. We can represent this information in an equation as:

0.20A+0.70B=0.44(27.5)...(2)

Upon substituting equation (1) in equation (2), we will get:  

0.20(27.5-B)+0.70B=0.44(27.5)

5.50-0.20B+0.70B=12.10

5.50+0.50B=12.10

5.50-5.50+0.50B=12.10-5.50

0.50B=6.6

\frac{0.50B}{0.50}=\frac{6.6}{0.50}

B=13.2

Therefore, Theresa needs 13.2 pounds of Brand A mixed nuts.

To find amount of Brand B mixed nuts, we will substitute B=13.2 in equation (1) as:

A+13.2=27.5

A+13.2-13.2=27.5-13.2

A=14.3

Therefore, Theresa needs 14.3 pounds of Brand B mixed nuts.

5 0
4 years ago
Antonio is having a pizza party for his birthday. He ordered 5 large pizzas, which have a total of 40 slices. He invited 8 peopl
love history [14]

Answer: the number of slices that each person will get is 4 4/9

Step-by-step explanation:

Antonio ordered 5 large pizzas, which have a total of 40 slices.

He invited 8 people to his party. If he plans to divide the pizza up equally among him and his friends, it means that the pizza would be divided among 9 people(Antonio and 8 friends = 9 people).

The number of slices that each of them will get would be

40/9 = 4 4/9 slices

4 0
3 years ago
Please help ! Finding the measure of angle 1,2,3 &4
nika2105 [10]

Answer:

I think this is the answer

Step-by-step explanation:

angle 3

180 - 93 = 87

angle 4

180 - 87 - 49 = 44

angle 2 is 49

angle 1

180 - 49 - 68 = 63

3 0
3 years ago
Read 2 more answers
The perimeter of the quadrilateral below is 64 units.
Harrizon [31]

Answer:

a = 22

x = 96

y = 144

Step-by-step explanation:

In the given figure

∵ The figure is a quadrilateral

∵ Each two adjacent have the same mark

∴ Every two adjacent sides are equal

∵ The perimeter of the quadrilateral is the sum of its outline sides

∴ The perimeter of the quadrilateral = 10 + 10 + a + a

∴ The perimeter of the quadrilateral = 20 + 2a

∵ The perimeter of the quadrilateral = 64 units

→ Equate the right sides of the perimeter

∴ 20 + 2a = 64

→ Subtract 20 from both sides

∵ 20 -20 + 2a = 64 - 20

∴ 2a = 44

→ Divide both sides by 2 to find a

∴ a = 22

<em>If a line segment joins the vertex of measure y and the vertex of measure 24°, then it will divide the quadrilateral into 2 congruent triangles by the SSS case.</em>

→ Use the result of congruency to find x

∵ The opposite angles of measures x and 96° are equal

∴ x = 96

∵ The sum of the measures of the angle of a quadrilateral is 360°

∴ 96° + y° + 96° + 24° = 360°

→ Add the like terms on the left side

∵ (96 + 96 + 24) + y = 360

∴ 216 + y = 360

→ Subtract 216 from both sides

∵ 216 - 216 + y = 360 - 216

∴ y = 144

6 0
3 years ago
Marley made 80% of what she made last week. If she $72 this week how much did he make last week
iris [78.8K]
I believe the answer is, 90. Im not 100% sure because my math is sometimes off.
8 0
4 years ago
Read 2 more answers
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