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Julli [10]
3 years ago
7

Someone help "explain how you would use addition to find the product of -2 and 5 "

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
3 0
Use a number line, it helps a lot
Troyanec [42]3 years ago
3 0
You need to add like the normal form and then add the symbol of the bigger
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HELPPPPPPP PLEASE i need to know the answer like right now pleaseee just look at the picture and please help
Marrrta [24]
I’m pretty sure it’s B. But I could be wrong.
7 0
3 years ago
Read 2 more answers
Why is it mathematically legal to multiply 2 √ 2 by √ 2 √ 2 in order to rationalize the denominator?
Gala2k [10]
Well if you're referring to rationalizing \bf \cfrac{2}{\sqrt{2}}, which simply means, getting rid of the pesky radical at the bottom

well, it boils down to, hmm say... a quantity or even a polynomial, multiplied times 1, is itself, 2*1=2, 3*1 = 3, ducks*1 = ducks, spaghetti * 1 = spaghetti

or whatever * 1 = whatever
and the value of the multiplicand, doesn't change in anyway, is the same thing before and after the multiplication by 1

now....1 can also be a fraction  \bf \cfrac{2}{2}=1\qquad \cfrac{3}{3}=1\qquad \cfrac{1,000,000}{1,000,000}=1
\\\\\\
\cfrac{ducks}{ducks}=1\qquad \cfrac{spaghetti}{spaghetti}=1\qquad \cfrac{cheese}{cheese}=1
\\\\\\
\cfrac{\textit{the quick fox jumped}}{\textit{the quick fox jumped}}=1\qquad \cfrac{whatever}{whatever}=1

so.. when you're doing \bf \cfrac{2}{\sqrt{2}}\cdot \cfrac{\sqrt{2}}{\sqrt{2}}\iff \cfrac{2}{\sqrt{2}}\cdot1

and the value multiplicand doesn't change in any way

now, try this in your calculator  \bf \cfrac{2}{\sqrt{2}}\cdot \cfrac{\sqrt{2}}{\sqrt{2}}\implies \cfrac{2\sqrt{2}}{\sqrt{2^2}}\implies \cfrac{2\sqrt{2}}{2}\implies \sqrt{2}\\\\
-----------------------------\\\\
\textit{check how much is }\cfrac{2}{\sqrt{2}}\textit{ in your calculator}
\\\\\\
\textit{then check how much is }\sqrt{2}\textit{ in it}
6 0
3 years ago
The class president wants to survey the students at the high school about the selection of food offered by the school cafeteria.
lesantik [10]

Answer:

C . Sample : 6 boy and 7 girls

Step-by-step explanation:

Data :

  Boys = 150

  Girls = 175

So ratio between boys and girls

     175/150  = 1.67

So when boy is 6

   6 ×1.667 = 7

5 0
2 years ago
The function C(x) = 25x + 50 represents the labor cost (in dollars) for Certified Remodeling to build a deck, where x is
Whitepunk [10]

Answer:

  • Master Remodeling

Step-by-step explanation:

<em>Original question is attached</em>

<h3>Option 1</h3>
  • C(x) = 25x + 50
  • C(8) = 25*8 + 50 = $250
<h3>Option 2</h3>
  • As per table, the rate of change is $30 per 2 hours.
  • So 8 hours will cost
  • $190 + $30 = $220

As we see the second option is cheaper so we should hire the Master Remodeling

5 0
3 years ago
Which is the graph for the equation y=-3x + 4?
Ivahew [28]

Answer:

its look like this

Step-by-step explanation:

3 0
3 years ago
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