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kherson [118]
3 years ago
11

Please help. I will mark you as brainliest !

Mathematics
2 answers:
Oliga [24]3 years ago
8 0

Answer:

x \times x + x \times 4 + x \times x + x \times 1 - 3 \times x + 3 \times 4 + 3 \times x + 3 \times 1

gregori [183]3 years ago
6 0

Answer:

D. (x-3)(x-3)(x-1)

Step-by-step explanation:

(x³-7x²+15x-9)/(x-3) = x²-4x+3<em> (see attached)</em>

x²-4x+3=(x-1)(x-3) <em>(factorisation)</em>

∴x³-7x²+15x-9=(x-3)(x-3)(x-1)

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A kite is flying 20 ft off the ground. Its line is pulled taut and casts a 15 ft - shadow. Find the length of the line. If neces
Kryger [21]

Answer:

The answer to your question is 25 ft

Step-by-step explanation:

Data

height = 20 ft

leg = 15 ft

length of the line = ?

To solve this problem use the Pythagorean theorem.

Height = short leg = b

leg = long leg = a

length of the line = hypotenuse = c

- Substitution

         c² = (20)² + (15)²

-Simplification

         c² = 400 + 225

         c² = 625

-Result

         c = \sqrt{625}

         c = 25 ft

6 0
3 years ago
What value of a makes the equation true 30/45=6/a
rusak2 [61]
As you know 30/45 = 6/9 
So a = 9 makes the equation true


5 0
3 years ago
the ratio of girls to boys in the sixth grade is 5:3. If there are 400 sixth graders, how many boys are there?
PilotLPTM [1.2K]

Answer:

boys = 250

girls = 150

Step-by-step explanation:

5g = 3b       eq. 1

g + b = 400       eq. 2

g = girls

b = boys

From the eq. 2

g = 400 - b

Replacing this last eq. on eq. 1:

5(400-b) = 3b

5*400 + 5*-b = 3b

2000 - 5b = 3b

2000 = 3b + 5b

2000 = 8b

2000/8 = b

250 = b

From eq. 2

g + 250 = 400

g = 400 - 250

g = 150

Check:

from eq. 1

5*150 = 3*250  = 750

3 0
2 years ago
How many times does 73 go into 141
tatiyna
Divide 141 by 73 

73 only goes into 141 once
6 0
3 years ago
Read 2 more answers
Tim purchases a new bike for $72.99. A 5% sales tax is charged for these items. What is the total cost, including
bulgar [2K]

Answer:

76.64 hope this helps!

3 0
3 years ago
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