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3 years ago

The difference of a number and 4 is 9

Mathematics

1 answer:

choli [55]3 years ago

6 0

Answer:

5 maybe

Step-by-step explanation:

when speaking in difference, it's usually talking about subtraction! so when written down your problem would look like : x - 4 = 9 . (x=5)

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During the first four months of the year, Jack earned $1270, $1150, $870 and $1450 If Jack must have an average salary of at lea

tia_tia [17]

Answer:

1010

Step-by-step explanation:

There are a whole class of questions that rely on the method to this one.

First add up what you know

1270 + 1150 + 870 + 1450 = 4740

Now add on the 5th month (which you don't know. Call it x)

4740 + x

Divide by 5

(4740 + x)/5 = 1150 and that is your equation

Solution

Multiply both sides by 5

5*(4740 + x) / 5 = 1150 * 5

4740 + x = 5750

Subtract 4740 from both sides

4740 - 4740 + x = 5750 - 4740

x = 1010

Which seems kind of low, but that's what the numbers come to.

6 0

2 years ago

If f(x)=log2(x+4), what is f^-1(3)?

zalisa [80]

$f\left( x \right) =\log _{ 2 }{ \left( x+4 \right) } \\ \\ \log _{ 2 }{ \left( x+4 \right) } =y\\ \\ { 2 }^{ y }=x+4$

$\\ \\ x={ 2 }^{ y }-4\\ \\ \therefore \quad { f }^{ -1 }\left( x \right) ={ 2 }^{ x }-4\\ \\ \therefore \quad { f }^{ -1 }\left( 3 \right) ={ 2 }^{ 3 }-4=4$

3 0

3 years ago

Read 2 more answers

A rectangular piece of paper has an area of 117 square inches and a perimeter of 44 inches. What are the dimensions of the paper

-Dominant- [34]

Answer:

13x9

Step-by-step explanation:

half of perimeret of rectangle L+W

half of perimeter of rectangle = 44/2 = 22

L+W=22

LxW=117

Think of 2 numbers that added =22 and multiplied =117

13+9 =22

13x9 =117

3 0

2 years ago

Jasmine is painting a storage box she bought at a garage sale. The storage box is in the shape of a rectangular prism with the d

natulia [17]

Answer:

240

Step-by-step explanation:

4 x 2 x 3 = 24 x 10 = 240 milimeters

8 0

3 years ago

Given the function f(x) = 2x, evaluate f (3).

Vsevolod [243]

Answer:

Step-by-step explanation:

Given that f(3), x=3.

Since f(x) = 2x, we plug in 3 for x, and get 2 times 3. Therefore, the answer comes out to 6.

4 0

2 years ago

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The difference of a number and 4 is 9​

The difference of a number and 4 is 9