When the discriminant, b² + 2a, is greater than 0, there are two real solutions. 49 is the perfect square of 7, so the solutions are also rational: plus and minus 7

5 0

3 years ago

What is the product of 47.55(8.4)?

Gre4nikov [31]

Answer:

399.420

Step-by-step explanation:

1) Use the algorithm method.

4 7 . 5 5

× 8 . 4

1 3 2 2

1 9 . 0 2 0

3 6 4 4

3 8 0 . 4 0 0

3 9 9 . 4 2 0

2) Therefore, $47.55\times 8.4=399.420$ .

399.420

5 0

2 years ago

Simplify the expression by combining like terms<br>4r+3c-2r+9c

Novay_Z [31]

Answer:

2r+12c

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

15f) Determine the line of symmetry. y = x2+16x+64

Slav-nsk [51]

Answer:

x=-8

Step-by-step explanation:

the equation is in standard form of y=ax^2+bx+c

so, to find the vertex, or axis of symmetry do -b/2a.

-16/2(1)=

-8

7 0

3 years ago