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3 years ago

What is the value of?

Mathematics

1 answer:

katrin [286]3 years ago

8 0

Answer:

70 degrees

Step-by-step explanation:

Since the angles of a triangle have to add up to 180 degrees, you know that the third angle of the triangle on the left would be 180 - 60 - 65 = 55 degrees. Then, since the angles on a straight line have to add up to 180 degrees you could find one of the two missing angles of the second triangle by doing

180 - 55 - 50 = 75.

Then, you have 2 out of the 3 angles of the triangle on the right and you can find the third, the ?, by doing 180 - 75 - 35 = 70 degrees

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Christina estimates that she will spend $250 on new summer clothes. She actually spent $350. what is the percent error? Round to

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Answer:

60%

Step-by-step explanation:

250÷350=0.6 which is equal to 60%

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3 years ago

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The following formula is used in economics to find a company's net income N, where P is the sales price, V is the variable cost

NISA [10]

Answer:

$\displaystyle S = \frac{N + F}{P - V}$

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

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

$\displaystyle N = S(P - V) - F$

Step 2: Solve for S

Rearrange.

[Addition Property of Equality] Add F on both sides: $\displaystyle N + F = S(P - V)$
[Division Property of Equality] Isolate S: $\displaystyle \frac{N + F}{P - V} = S$
Rewrite: $\displaystyle S = \frac{N + F}{P - V}$

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3 years ago

The diameter of a single human hair is .000025 meters. rewrite this number in scientific notation.

enyata [817]

Answer:

2.5 * 10^-5

Step-by-step explanation:

2.5 * 10^-5

If the number is between 1 and -1 excluding 0. Then

count the number of zeros

add 1 more

write the notation of where you put the decimal place

The power is minus and equal to the number of zeros + 1

0.000025

zeros: the number of zeros = 4

Add 1: 4 + 1 = 5

Decimal goes between the 2 and the 5

2.5

Power: = - 5

Answer: 2.5 * 10^-5

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3 years ago

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Answer:

555

Step-by-step explanation:

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3 years ago

The top left angle measure is ?

Gnesinka [82]

x = 100°

In a parallelogram all the interior angles must add up to 360°

Opposite angles of a parallelogram are equal

360° = x + x + 80° + 80°

360° = 2x + 160°

2x = 200°

x = 100°

Alternatively:

x and 80° are corresponding angles because they are on the same line that crosses two parallel lines. Corresponding angles are complementary and add up to 180°.

180° = x + 80°

x = 100°

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3 years ago

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