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hoa [83]
3 years ago
6

What is the rectangle's height and base?

Mathematics
2 answers:
HACTEHA [7]3 years ago
6 0

Answer:

Base = 16cm

Height = 7cm

riadik2000 [5.3K]3 years ago
3 0

Answer:

base = 16 cm

height = 7 cm

Step-by-step explanation:

area of a rectangle = base (b) x height (h)

base (b) = 9 + h

area = 112 cm²

plug in values:

112 = (9 + h) * h

112 = 9h + h²

h² + 9h - 112 = 0

<u>h can be solved using quadratic equation</u>

       -9 ± √ (9² - 4 (1) (-112))

h = --------------------------------------

                        2

     -9 ± √529

h = ----------------

            2

h = 7  ;    h = -16

therefore  the height of  a rectangle (h) = 7 cm

<u>solve for base (b)</u>

base (b) = 9 + h

base (b) = 9 + 7

base (b) = 16 cm

proof:

area of a rectangle = base (b) x height (h)

112 = 16 * 7

112 = 112 ---- ok

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madam [21]

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Step-by-step explanation:

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(16x2 - 20x + 9) = (4x - 3)
Elenna [48]

Answer:

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-6x+5y+2z=-11<br> -2x+y+4z=-9<br> 4x-5y+5z=-4
AlladinOne [14]

Answer:

[4, 3, -1]

Explanation:

When solving systems of equations in three variables, pick two equations to work with first, solve for both variables, plug them into one of the equations you first started on, then in the end, put them altogether:

{-6<em>x</em> + 5<em>y</em> + 2<em>z</em> = -11 ←

{-2<em>x</em> + <em>y</em> + 4<em>z</em> = -9 We can eliminate the<em> </em><em>y-</em><em>values</em><em> </em>obviously

{4<em>x</em> - 5<em>y</em> + 5<em>z</em> = -4 ←

{-6<em>x</em> + 5<em>y</em> + 2<em>z</em> = -11

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___________________

-2<em>x</em> + 7<em>z</em> = -15

- 7<em>z</em> -7<em>z</em>

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___ ________

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I am joyous to assist you anytime.

3 0
3 years ago
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