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3 years ago

Find two numbers, if … b Their sum is −7 and their difference is 14

Mathematics

1 answer:

Delicious77 [7]3 years ago

4 0

Answer:

x=0

y=-21/7

Step-by-step explanation:

Let the two unknown be x and y

x+y=-7...(1)

x-y=14...(2)

From (1) make x the subject of formula

x=-7-y...(3)

Substitute (3) into (2)

-7-y-y=14

-7-2y=14

Add 7 to both sides

-2y=21

Add both sides by-2

y=-21/2

Substitute the value of y into (3)

x=-7-(-21/2)

x=-7+21/3

Lcm

x=-21+21/3

x=0/3

x=0

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Evaluate f − g + ( − 2 ) f−g+(−2)f, minus, g, plus, left parenthesis, minus, 2, right parenthesis where f = − 3.005 f=−3.005f, e

BaLLatris [955]

Answer:

$f - g + (-2) = -9.7005$

Step-by-step explanation:

Given

f = -3.005

g = 4.7

Required

Evaluate: $f - g + (-2)$

To do this, we simply substitute the values of f and g in the above expression

$f - g + (-2)$ becomes

$-3.005 - 4.7 + (-2)$

Open the bracket

$-3.005 - 4.7 -2$

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Hence;

$f - g + (-2) = -9.7005$

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