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4 years ago

ms. young is 25 years old. her grandfather is 4 times as old. how old is her grandfather? use place value or standard algorithm

Mathematics

2 answers:

Delicious77 [7]4 years ago

8 0

Answer:

he is 100 yrs old.

Step-by-step explanation:

25x4=100

olga_2 [115]4 years ago

7 0

Answer:

Her grandfather is 100 years old.

Step-by-step explanation:

[work in picture, it says 90 instead of 100]

Ms. young is 25 years old. Her grandpa is 4 times older.

25 * 4 = 100

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Convert 22/3 into a mixed number

trasher [3.6K]

22/3= 7 1/3 hope that helped

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3 years ago

What is the roots of f(x)=-x^2-6x-14

Nutka1998 [239]

Answer:

$x=-3\pm i \sqrt{5}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Algebra I

Standard Form: ax² + bx + c = 0
Quadratic Formula: $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Algebra II

Imaginary roots: √-1 = i

Step-by-step explanation:

Step 1: Define function

f(x) = -x² - 6x - 14

Step 2: Set up

Set equation equal to 0: -x² - 6x - 14 = 0
Factor out -1: -(x² + 6x + 14) = 0
Divide both sides by -1: x² + 6x + 14 = 0

Step 3: Define variables

a = 1

b = 6

c = 14

Step 4: Find roots

Substitute: $x=\frac{-6\pm\sqrt{6^2-4(1)(14)} }{2(1)}$
Exponents: $x=\frac{-6\pm\sqrt{36-4(1)(14)} }{2(1)}$
Multiply: $x=\frac{-6\pm\sqrt{36-56} }{2}$
Subtract: $x=\frac{-6\pm\sqrt{-20} }{2}$
Factor: $x=\frac{-6\pm\sqrt{-1} \sqrt{20} }{2}$
Simplify: $x=\frac{-6\pm2i \sqrt{5} }{2}$
Factor: $x=\frac{2(-3\pm i \sqrt{5} )}{2}$
Divide: $x=-3\pm i \sqrt{5}$

8 0

3 years ago

You are standing on the second floor balcony looking down at a car 50 feet away. Your line of sight is 15 feet above the ground.

fgiga [73]

Answer:

16.7°

Step-by-step explanation:

Let the angle is x

Imagine the right triangle with the angle x, with side opposite to angle x 15 ft and the adjacent side is 50 ft.

Use trigonometry:

tangent = opposite / adjacent
tan x = 15/50
tan x = 0.3
x = arctan 0.3
x = 16.7° (rounded)

4 0

3 years ago

Nia solved the equation -1.98 = 5.2v + 13.1. Her answer was v = -2.9. She is fairly confident about her answer, but wants to do

valina [46]

Answer:

substitute for v, when v = -2.9

Step-by-step explanation:

$-1.98=5.2v+13.1$

subtract 13.1 on both sides.

$-15.08=5.2v$

divide by 5.2 to isolate v

$\frac{-15.08}{5.2} = \frac{5.2v}{5.2}$

$-2.9=v$

substitute for v

$-1.98=5.2(-2.9)+13.1$

$-1.98=-15.08+13.1$

$-1.98=-1.98$

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3 years ago

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crimeas [40]

Answer:

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Step-by-step explanation:

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3 years ago

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