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4 years ago

Can someone help me on this

Mathematics

2 answers:

BlackZzzverrR [31]4 years ago

8 0

Answer:

29 degrees

Step-by-step explanation:

angle ABD = (x + 9) degrees

angle DBC = (2x - 19) degrees

angle ABC = angle ABD + angle DBC

50 = (x + 9) + (2x - 19)

= 3x - 10

3x = 50 + 10

x = 60/3

x = 20

Substitute x = 20 into angle ABD = (x + 9)

angle ABD = 20 + 9

angle ABD = 29 degrees

Doss [256]4 years ago

7 0

Answer:

Step-by-step explanation:

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What is the missing value in the proportion 4/5 = x/30?

ra1l [238]

Answer:

$\displaystyle x = 24$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{4}{5} = \frac{x}{30}$

Step 2: Solve for x

[Multiplication Property of Equality] Cross-multiply: $\displaystyle 5x = 120$
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sweet [91]

Answer:

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3 years ago

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never [62]

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4 years ago

Read 2 more answers

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larisa86 [58]

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3 years ago