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alexandr1967 [171]
3 years ago
8

Expanding Expressions: Expand the following expressions.

Mathematics
2 answers:
Kryger [21]3 years ago
8 0

Answer:

1) \:  \:  \:  \:  \: 5(r + 2) \\ \:  \:  \:  \:  \:  \:  \:  \:  5r + 10 \\  \\ 2) \:  \:  \:  \:  \: 6b(b - 2a) \\  \:  \:  \:  \:  \:  \:  {6b}^{2}  - 12ab \\  \\ 3) \:  \:  \:  \:  \: 8cd(c - 2 + 40) \\  \:  \:   {8c}^{2}d - 16cd + 320cd \\   {8c}^{2}d - 304cd

Fed [463]3 years ago
8 0

Answer:

Expand the following expressions.

1. 5 (r +2)

= (5×r) + (5×2)

= 5r + 10

2. 6b (b-2a)

= (6b×b) - (6b×2a)

= 6b²-12ba

3. 8cd (c-2 +40)

= (8cd×c) - (8cd×2) + (8cd×40)

= 8c²d - 16cd + 320cd

= 8c²+ 304cd

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Name the quantity measured by each of the seven si base units and give the si symbol of the unit
Nikolay [14]

Answer:

Length , time, mass, current, temperature, amount of mass, luminous intesity

m, sec, kg, A, K, mol, cd

Step-by-step explanation:

Seven basic SI units are used for measurement of

Meter for length

Second for time

Kilogram for mass

Ampere for current

Kelvin for temperature

Mole for amount of mass

Candela for luminous intensity

Symbols of these SI units are

m for meter

sec for second

kg for kilogram

A for ampere

K for kelvin

mol for mole

cd for candela

5 0
4 years ago
A red balloon is 40 feet above the ground and rising at 2 feet per second. At the same time, a blue balloon is 60 feet above the
VikaD [51]

Answer:

40+2s=60-3s

Step-by-step explanation:

The red balloon starts 40 feet off the ground and rises 2 feet per second. This means the height of the red ballon is 40+2s.

The blue balloon starts 60 feet off the ground at starts falling 3 feet per second. This means the height of the blue balloon is 60-3s.

Because we want to find out when the balloons will be the same height, we set them equal to each other.

40+2s=60-3s

4 0
3 years ago
Please help me out!!!!
Zielflug [23.3K]
A. 2.5 B. 0 C. -1.6, i think, this stuff was never really my forte ha
6 0
3 years ago
the movie shop sells posters for $7 dvd for $15 and cd for $9 write an expression to represent the total cost for 2 posters d dv
Nat2105 [25]
Try (7x2)+d+c
I hope this helped?
If not maybe, 14+d+c?
3 0
3 years ago
Which function represents the exponential function f(x) = 3x after a vertical stretch by a factor of 8 and a reflection across t
irina1246 [14]

Answer:

g(x)=-8(3^x)

Step-by-step explanation:

Given: f(x)=3^x

Multiply by 8: f(x)=8(3^x)

Negate function: g(x)=-8(3^x)

5 0
3 years ago
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