3 years ago

X2 + 4x - 21 = 0 quadratic formula

Mathematics

1 answer:

Elena-2011 [213]3 years ago

6 0

Answer:

Step-by-step explanation:

x2 +4x-21=0. solve for x

$x = \frac{7}{2}$

$x = 3 \frac{1}{2} \ x = 3.5$

You might be interested in

3x2 = 81 b. (x - 1)(x + 1)-9 = 5x C. X - 9x + 10 = 32 d. 6x(x - 9) = 29

irakobra [83]

Answer:

a. 3x^2 = 81

x^2 = 27

$x = 3\sqrt{3} or -3\sqrt{3}$

Step-by-step explanation:

6 0

3 years ago

The square below represents one whole. What percent is represented by the shaded area?

Leokris [45]

Answer:

92%

Step-by-step explanation:

because there are 100 squares and 92 are shaded

8 0

3 years ago

A scientist estimated that a mixture would need 6 milliliters of a chemical to balance. The actual amount needed was 7 millilite

Mashcka [7]

Percent relative error is calculated by the formula: (experimental value - literature value/ experimental value) x 100%

Therefore, (6-7/7) x 100% = 14.3%
Your answer is in absolute value :)

6 0

3 years ago

I NEED HELP IMMEDIATELY

stepan [7]

Answer:

Between 80 and 160

Step-by-step explanation:

this is such a bad graph i honestly could not give you an exact answer

6 0

2 years ago

A student has 3 sticks of wood that measures 15 inches, 18 inches, and 30 inches. Can the student use these sticks to make a rig

mixer [17]

Answer:no

Step-by-step explanation:

3 0

3 years ago