3 years ago

Helppp pleaseeee I really need help

Mathematics

2 answers:

Naya [18.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

Talja [164]3 years ago

4 0

Step-by-step explanation:

$= \frac{(2c {}^{2} + c - 2) }{(c + 1)} \\ rationalise \: the \: denominator \\ = \frac{(2 {c}^{2} + c - 2)(c - 1)}{(c + 1)(c - 1)} \\ = \frac{(2 {c}^{3} - 2 {c}^{2} + {c}^{2} - c - 2c + 2) }{( {c}^{2} - {1}^{2} )} \\ = \frac{(2 {c}^{3} - {c}^{2} - 3c + 2 )}{( {c}^{2} - 1) }$

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2. A poster is 15 cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 10 cm border on all sides.

lilavasa [31]

Set up two equations
T = how tall
W = how wide.
T = W + 25 is the first equation
5
×
{
2
(
T
+
10
)
}
+
5
×
(
2
×
W
)
=
1350
This equation is the total height adding 5 for the top border and 5 for the bottom border. Then multiplying the total height by the width of the border 5, time 2 because there are two sides that are tall Then adding 5 times two widths.

4 0

3 years ago

Help pleaseeeee nowwwwwwww

cupoosta [38]

#1 - 8/7 7:8
#2 -3:4
#3 - 3:8
#4 -4:3

6 0

3 years ago

(+8)-(-9)+(-16)-(-4)=

otez555 [7]

Answer:

Step-by-step explanation:

8−(−9)−16−(−4)