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mylen [45]
3 years ago
6

Please, someone help? ​

Mathematics
1 answer:
anzhelika [568]3 years ago
4 0

Answer:

x = -5 + \sqrt{26}

Step-by-step explanation:

f(x) = x² + 10x - 1

        x² + 10x = 1

        x² + 10x + 25 = 1 + 25

        (x + 5)² = 26

take the square root of each side to get:

        x + 5 = √26

        x = √26 - 5  or -5 + √26

       

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A spinner had four lettered sections. The table shows the results of an experiment spinning the pointer.
zhenek [66]

Answer:

Q 3/10    R 4/25    S 3/50  T 12/25

Step-by-step explanation:

Q 15/50    3/10

R 8/50     4/25

S 3/50    3/50

T 24/ 50   12/25

3 0
3 years ago
Read 2 more answers
Rachel spends 1/4 of her money
astra-53 [7]

Step-by-step explanation:

Let's start by defining our term:

How much she had at the beginning = B

Now let's edit that value like the problem says

B - B/4 - B/8 = 40

Let's multiply everything by 8 to get rid of any denominators

8B - 2B - B = 320

5B = 320

B = 64

Answer:

Rachel had $64 at the beginning.

4 0
3 years ago
The equation which represents x, the width of the border is 2 left-bracket (12 + 2 x) + (15 + 2 x) right-bracket = 74. What is t
bulgar [2K]

Answer:

2 1/2

Step-by-step explanation:

If you do the step by step calculation:

Step 1: Simplify both sides of the equation.

2(12+2x+15+2x)=74

(2)(12)+(2)(2x)+(2)(15)+(2)(2x)=74(Distribute)

24+4x+30+4x=74

(4x+4x)+(24+30)=74(Combine Like Terms)

8x+54=74

8x+54=74

Step 2: Subtract 54 from both sides.

8x+54−54=74−54

8x=20

Step 3: Divide both sides by 8.

8x divide by 8 and that is 20 divided by 8

leaves you with the answer 5/2.

If you then turn the improper fraction into a mixed fraction you get 2 and one half.

Answer= 2 1/2 or "a" <u>DEPENDS ON WHAT QUIZ YOU HAVE</u>

Peace!

4 0
4 years ago
Suppose Julie has already earned 36 points right and solve an addition equation to find the number of points he still needs to e
mario62 [17]

Answer:

50 = 36 + p

Step-by-step explanation:

Given

Total = 50

Points = 36

See attachment

Required

Determine the additional points (p) needed

The total point equals the sum of the already earned point and the points needed.

i.e.

Total = Points + p

Substitute values for Total and Points

50 = 36 + p

7 0
3 years ago
Find the area of the figure.
Feliz [49]

Look up "Everything You Need To Know About Math In One Big Fat Notebook pdf." It's the best thing I've ever been given, I have it with me in math class all the time and I've aced every test.

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