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QveST [7]
3 years ago
7

Find the unknown length given that the triangles are similar

Mathematics
2 answers:
zvonat [6]3 years ago
4 0
Use a proportion.

9/15 = 12/x

Cross multiply.

9x = 15 * 12

9x = 180

x = 20

Answer: 20 mm
Firdavs [7]3 years ago
3 0
Hello!

On one side, the length is 6 mm on the small triangle, and on the big one, it's 10. The ratio is 6:10

You can make a proportion

\frac{6}{10} =  \frac{12}{x}

Cross multiply

10 × 12 = 120

Divide by 6 to get x

120 ÷ 6 = 20

\framebox{x = 20 mm}
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A ∠A and ∠ B ∠B are complementary angles. If m ∠ A = ( 2 x + 18 ) ∘ ∠A=(2x+18) ∘ and m ∠ B = ( 6 x + 8 ) ∘ ∠B=(6x+8) ∘ , then fi
Aleks [24]

Answer:

<B = 56 degrees

Step-by-step explanation:

The sum of two complementary angle is 90 degrees

Hence <A + <B = 90

2x++18 + 6x + 8 = 90

8x + 26 = 90

8x = 90-26

8x = 64

x = 64/8

x = 8

Get <B

<B = 6x+8

<B = 6(8) + 8

<B = 48+8

<B = 56 degrees

7 0
3 years ago
Plz help will mark brainlest
mart [117]
He will do about 16 rotations
6 0
3 years ago
The function of f is defined as follows
Alborosie

Answer:

f(-121) = -5

f(31) = 3

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = ∛(x - 4)

f(-121) is x = -121

f(31) is x = 31

<u>Step 2: Evaluate</u>

f(-121)

  1. Substitute in <em>x</em>:                    f(-121) = ∛(-121 - 4)
  2. [Radical] Subtract:               f(-121) = ∛(-125)
  3. [Radical] Evaluate:              f(-121) = -5

f(31)

  1. Substitute in <em>x</em>:                    f(31) = ∛(31 - 4)
  2. [Radical] Subtract:               f(31) = ∛27
  3. [Radical] Evaluate:              f(31) = 3
7 0
2 years ago
Beth made wristbands and belts for a craft sale. She sold 30 of these items. Each Wristband sold for $5.50. Each belt sold for $
Serhud [2]
Let W = number of wristbands.
Let B = number of belts.

Number equation: W + B = 30
Value equation: 5.50W + 8.75B = 204.00

Multiply the top equation by 5.50 and subtract it from the bottom equation:
5.50W + 8.75B = 204.00 <--- 5.50(W + B = 30)
5.50W + 5.50B = 165.00
---------------------------------
---> 3.25B = 39.00 <--- subtract down the columns
---> B = 12 <--- divide by 3.25

Since W + B = 30 ---> W + 12 = 30 ---? W = 18

There were 12 belts and 18 wristbands.
3 0
3 years ago
A student has a savings account with $475 in it.
zalisa [80]

Answer: 7 weeks

Step-by-step explanation:

Let x represent number of weeks

Let y represent the total amount

Amount = Paycheck deposited * number of weeks + Initial amount

y = 125x + 475

Number of weeks until she has $1350

1350 = 125x + 475

125x+475-475=1350-475

125x=875

x=7

Therefore, the student will have $1350 in her bank account after 7 weeks

3 0
2 years ago
Read 2 more answers
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