2 years ago

Please help me with my HW

Mathematics

1 answer:

ioda2 years ago

7 0

38,249 and 19,865 don't round up to 30,000, the rest do

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Solve the system of equations using substitution. Write the solution as an ordered pair.

IrinaK [193]

Answer:

(-3, 3)

Step-by-step explanation:

Substitute for y:

x+6 = -2x -3

3x = -9 . . . . . . . add 2x -6 to both sides

x = -3 . . . . . . . . divide by 3

y = (-3) +6 = 3 . . substitute for x in the first equation

The solution is ...

(x, y) = (-3, 3)

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3 years ago

Brinn's rectangular kitchen has an area of 81 square feet. the kitchen is 9 times as many square feet as Brinn's pantry. If the

elixir [45]

3 feet, you divide 81 by 9 and you get the square feet of the pantry, then you divide that by 3

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2 years ago

Express 78 billion in scientific notation

ryzh [129]

Answer:

$7.8 * 10^{10}$ is scientific notation of 78 billion

Step-by-step explanation:

For scientific notation , follow the following notation:

$a * 10^{b}$ -------->(equation 1)

Let, $a^{'} = 78 billion$

$a^{'} = 78000000000$

$a^{'} = 78000000000.0$

In standard form

$a = 7.8000000000$

$a = 7.8$

As decimal point move 10 places from right to left, therefore

b = 10

Put the value of 'a' and 'b' in (equation 1)

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3 years ago

What is 16a + 12b in factorise form

makvit [3.9K]

Answer:

4 (4a+3b)

Step-by-step explanation:

They both have a common factor of 4. so that's why the four ia outside.

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hodyreva [135]

2x3=6. So the Greatest Common Factor (GCF) is 6

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