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3 years ago

If a + b = c and ab = 8, what are a and b?

Mathematics

2 answers:

Marizza181 [45]3 years ago

8 0

Ab include-
1•8=8
-1•-8=8
4•2=8
-4•-2=8

a+b=c include-
1+8=9
-1+-8=-9
4+2=6
-4+-2=-6

ehidna [41]3 years ago

5 0

Answer:

2 and 4

Step-by-step explanation:

2x4 = 8

2 + 4 = 6, which could be c

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The cost of 2 jackets and 3 skirts was sh 1800. After the cost of a jacket and that of a skirt was increased by 20%,the cost of

nadya68 [22]

Answer:

New cost of jacket = $1.2x=1.2\times 600=720\ \text{sh}$

New costs of skirt = $1.2y=1.2\times 200=240\ \text{sh}$

Step-by-step explanation:

Let original cost of jacket = $x$

original cost of skirt = $y$

The equation will be

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The equation will be

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The equations are

$2x+3y=1800$ $\times 0.8$

$7.2x+2.4y=4800$

$1.6x+2.4y=1440$

$7.2x+2.4y=4800$

Subtracting the above two equations we get

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New cost of jacket = $1.2x=1.2\times 600=720\ \text{sh}$

New costs of skirt = $1.2y=1.2\times 200=240\ \text{sh}$ .

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