1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horsena [70]
3 years ago
15

Write the subtraction expression as an equivalent addition expression and then evaluate it.

Mathematics
1 answer:
Serga [27]3 years ago
7 0

Answer:

hmm. 15 - 12 =3

Step-by-step explanation:

correct ba sorry grade 4 palang bobo pa

You might be interested in
Simplify (Cot t) (Sin t)/(Cos t)
Serhud [2]

Answer:

1

Step-by-step explanation:

(Cot t) (Sin t)/(Cos t)

cot = cos / sin

Replacing cot t with cos t / sin t

cos t/ sin t * (Sin t)/(Cos t)

Canceling the sin t's

cos t / cos t

1

7 0
3 years ago
Rationalize the denominator of sqrt -49 over (7 - 2i) - (4 + 9i)
zubka84 [21]
\sqrt{ \frac{-49}{(7-2i)-(4+9i) } } 


This one is quite the deal, but we can begin by distributing the negative on the denominator and getting rid of the parenthesis:

\frac{ \sqrt{-49}}{7-2i-4-9i}

See how the denominator now is more a simplification of like terms, with this I mean that you operate the numbers with an "i" together and the ones that do not have an "i" together as well. Namely, the 7 and the -4, the -2i with the -9i.
Therefore having the result: 

\frac{ \sqrt{-49} }{3-11i}

Now, the \sqrt{-49} must be respresented as an imaginary number, and using the multiplication of radicals, we can simplify it to \sqrt{49}  \sqrt{-1}
This means that we get the result 7i for the numerator.

\frac{7i}{3-11i}

In order to rationalize this fraction even further, we have to remember an identity from the previous algebra classes, namely: x^2 - y^2 =(x+y)(x-y)
The difference of squares allows us to remove the imaginary part of this fraction, leaving us with a real number, hopefully, on the denominator.

\frac{7i (3+11i)}{(3-11i)(3+11i)}

See, all I did there was multiply both numerator and denominator with (3+11i) so I could complete the difference of squares.
See how (3-11i)(3+11i)= 3^2 -(11i)^2 therefore, we can finally write:

\frac{7i(3+11i)}{3^2 - (11i)^2 }

I'll let you take it from here, all you have to do is simplify it further.
The simplification is quite straightforward, the numerator distributed the 7i. Namely the product 7i(3+11i) = 21i+77i^2.
You should know from your classes that i^2 = -1, thefore the numerator simplifies to -77+21i
You can do it as a curious thing, but simplifying yields the result:
\frac{-77+21i}{130}
7 0
3 years ago
An object is moving at a speed of 9 kilometers every 6.5 years.
Ksivusya [100]

Answer:

The object is moving at 149 inches per day.

Step-by-step explanation:

6 0
2 years ago
What is the answer to 3+x=y​
NARA [144]

Answer: x=y-3    or            y=3+x

Step-by-step explanation:

7 0
2 years ago
In the table, hoe many cups of flour would you need to make 90 cookies? Graph the relationship below
-Dominant- [34]
Not sure what we need to do for this question, as it appears that you have already completed it, but looking over your answer, the graphed relationship looks correct! And it would take 3 cups of flour to make 90 cookies, as per the table.
3 0
3 years ago
Other questions:
  • Solving Linear Equations with Substitution
    6·1 answer
  • Match the x-coordinates with their corresponding pairs of y-coordinates on the unit circle.
    13·1 answer
  • when you start your shift, the warehouse has 1,483 ceiling fans. if you pack and ship 32 fans per hour, how many fans will be le
    13·1 answer
  • Angelo cuts a piece of wood for a project. The first cut is shown and can be represented by the equation y - 5x-1. The second cu
    10·1 answer
  • Can you think of any other real-life scenarios where parallel lines and transversals<br> exist ?
    11·2 answers
  • Use the law of cosines to find the balue of cos 0 . Round to answer to two decimal places
    7·1 answer
  • which of the following and multiplying by 5 give the product of perfect cube 500/200 5,000 1 none of these​
    13·1 answer
  • Factor to solve <br> X^2-2x-15=0
    10·1 answer
  • A company’s stock was selling at $28 a share.A month later , it was selling at $21 a share.What is the percent loss
    9·1 answer
  • In ΔTUV, u = 330 inches, t = 800 inches and ∠T=53°. Find all possible values of ∠U, to the nearest degree.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!