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masha68 [24]
3 years ago
14

What is the best estimate for 56.23 - 45.9? A. 9 B. 10 C. 11 D. 15

Mathematics
1 answer:
DIA [1.3K]3 years ago
5 0

Answer:

10 Letter B

Step-by-step explanation:

56.23 rounds down to 56 and 45.9 rounds up to 46. So 56 - 46 = 10

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Y = 4x - 2<br> y = x + 3
arlik [135]

Answer:

y=3x+1

Step-by-step explanation:

if im correct you are working on elimination, so you pretty much sub. so the difference between -2 and 3 is positive 1; the difference between 4x and x is 3x

are you working on elimination?

8 0
3 years ago
Francis is making cookies. The recipe for chocolate chip cookies calls for 2 2/3 cups of flour, the recipe for peanut butter cal
Alja [10]
If he wants to use as little flour as possible he should make the ginger snaps because if u make all of the denominators equivalent then those cookies use the least amount of flour. The peanut butter cookies use the most flour.
6 0
3 years ago
I am thinking of a number. If you multiply my number by 4, add -4 to the product, and then take 1/3 of the sum, the result is -6
gregori [183]

Answer:

-3.5??

Step-by-step explanation:

Work backwards :)

4 0
3 years ago
A parabola can be drawn given a focus of (8, 6) and a directrix of x=4. Write the equation of the parabola
Orlov [11]

Answer:

<em>The equation of the Parabola</em>

 <em>(y - 6 )² = 8 (x -6)</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given directrix  x = 4

we know that    x = h - a = 4

               h -a =  4  ...(i)

Given Focus  = ( 8,6)

we know that the Focus of the Parabola

         ( h + a , k ) = ( 8,6)

   comparing  h + a = 8 ...(ii)

                  k = 6

solving (i) and (ii) and adding

   h - a + h+ a = 8 +4

           2 h = 12

              h =6

   Put h = 6 in equation (i)

  ⇒     h - a =4

  ⇒   6 - 4 = a

  ⇒      a = 2

<u><em>Step(ii):-</em></u>

<em>The equation of the Parabola ( h,k) = (6 , 6)</em>

<em>( y - k )² = 4 a ( x - h )</em>

<em>(y - 6 )² = 4 (2) (x -6)</em>

<em>(y - 6 )² = 8 (x -6)</em>

<u><em></em></u>

3 0
3 years ago
Find the number of real number solutions for the equation. x^2+5x+7=0
koban [17]

Given a quadratic equation ax^2+bx+c=0, we define the discriminant as

\Delta = b^2-4ac

The number of real solutions of the equation depend on the sign of \Delta:

  • If \Delta>0 the equation has two solutions
  • If \Delta=0 the equation has one double solution
  • If \Delta the equation has no real solutions

In this case, we have

\Delta = 25-28=-3

And so this equation has no real solutions.

7 0
3 years ago
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