3 years ago

Pls help I’m in a call by myself with my math teacher

Mathematics

1 answer:

Studentka2010 [4]3 years ago

5 0

I’m pretty sure it’s 70 m i think

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Three angles of a quadrilateral are 75,120, 90,then the fourth angle..

Roman55 [17]

Answer:

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

Geometry

Sum of Angles in a Quadrilateral: 360

Step-by-step explanation:

Step 1: Set up

75 + 120 + 90 + ∠4 = 360

Step 2: Solve

Add: 285 + ∠4 = 360
[Subtraction Property of Equality] Subtract 285 on both sides: ∠4 = 75

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3 years ago

A2 + b2 = n2 because of the

Nataly_w [17]

Phytagorean Theorem i think

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3 years ago

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In a sale, all prices are reduced by 25%. Work out the

Leno4ka [110]

Answer:

1650

Step-by-step explanation:

2200*.25=1650 sale price

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3 years ago

PLS HELP (the second page has the options)

Tom [10]

The 3rd answer because -3 is the smallest y intercept

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3 years ago

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Find the 20th term of the arithmetic sequence 15,9,3,-3

kati45 [8]

Answer:

-99

Step-by-step explanation:

$a = 15 \\ d = - 6 \\ {n}^{th} term = a + (n + 1)d = 15 + (n - 1)( - 6) \\ {20}^{th} term =15 + (20 - 1)( - 6) = 15 - 114 = - 99$

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2 years ago