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3 years ago

Difference of a number and -3 is 6. what is the number

1 answer:

5 0

Let x = the number we are looking for:

Difference means that we subtract:

$x-(-3)=6$

Two negative signs turn it into one positive sign (a plus):

$x+3=6$

We need to get x by itself, so we subtract 3 from both sides:

$x=3$

So now we know that the number we were asked to find is 3.

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Nesterboy [21]

Answer: 21

Step-by-step explanation:

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2 years ago

Read 2 more answers

I don't get this. can someone help me. I have a whole packet of this.

Harrizon [31]

For #2, ∠3 and ∠1 are supplementary. You know that the measure of ∠1 is 162°, so what is ∠3? 180-162=18.
m∠3=18° if ∠1=162°.
Hope this helped!

7 0

3 years ago

Rice is being poured into a cylindrical container with radius 4.5 inches so

12345 [234]

asked:the istant of height is the same as the radius

given facts:cylindrical container with radius 3.5 inches height of rice increasing 0.5 inches per second

solve hidden given:(4.5+o.5+2)

what operation to be used: addition and subtraction

solve+4.5+05+2=6.0

chec: 6.0-4.5=1.5

8 0

3 years ago

Can someone help please i am really confused

Igoryamba

Answer:

so here we are told that angle CED is 39 degrees and in this diagram we have three angles the first one is Angle CED the next one is angle CEL and the last one is angle LED so angle c e l + angle LED is equals to angle c e d so in this case 3 x - 6 + x + 25 should be equal to 39 degrees collect the like terms 3 x + x + 25 - 6 is equals to 39 degrees 4X + 19 is equals to 39 cross the 19 over the equals sign that you have 4 x is equals to 39 + 19 4 x is equals to 68 divide both sides by 4 and x is equals to 17 then substitute replace where there is x with seventeen so in this case angle c e l will be 3 * 17 -6 we are multiplying 3 by 17 because it was 3 x and we got the value of x to be 17 so 3 * 17 is 51 -6 is 45 so angle CEL is 45 degrees you can do the same with the other angle that is angle LED and you get x to be 42

3 0

3 years ago

the length of a rectangle exceeds its width by 6 inches and the area is 40 square inches. What are the length and width of the r

Lorico [155]

Classic Algebra and its unnecessarily complicated sentence structure. As you may have probably known, Algebra has its own "vocabulary set".

"the length of a rectangle exceeds its width by 6 inches" -> length is 6 in. longer than width -> l= w + 6

Since we're solving for the length and width, let's give them each variables.

length = l = w+6

width = w

The next bit of information is "the area is 40 square inches"

Applying the formula for the area of a rectangle we can set up:

l x w = 40

replace "l", or length, with it's alternate value.

(w+6) x w = 40

distribute

$w^{2}$ + 6w = 40

subtract 40 from both sides

$w^{2}$ + 6w - 40 = 0

factor

(w - 4)(w + 10) = 0

solve for w

w= 4, or -10

So great, we have 2 values; which one do we choose? Since this problem is referring to lengths and inches, we will have to choose the positive value. There is not such thing as a negative distance in the real world.

We now have half of the problem solved: width. Now we just need to find the length which we can do but substituting it back into the original alternate value of l.

l = w + 6

w=4

l = 4 + 6 = 10

The length is 10 in. and the width is 4 in. Hope this helps!

8 0

3 years ago