Find the numbers in d blank

Mathematics

2 answers:

slega [8]3 years ago

6 0

Lets say:
Top row: a + b = 8
bottom row: c - d = 6
left column: a + c = 13
right column: b + d = 8

As you know: a + b = 8
Also b + d = 8
so from here we know a = d

c -d = 6 then---> c - a = 6 (because a = d) -> a = c - 6
We know a + c = 13 then
(c - 6) + c = 13
2c -6 =13
2c = 19
c = 19/2 = 9.5

but c - a = 6
9.5 - a = 6
a = 9.5 - 6 =3.5

but a = d = 3.5

a + b = 8
3.5 + b = 8
b = 8 -3.5 = 4.5

so a = 3.5, b = 4.5, c = 9.5, d = a = 3.5

Result:
a + b = 3.5 + 4.5 =8
c - d = 9.5 - 3.5 = 6
a + c = 3.5 + 9.5 = 13
b + d = 4.5 + 3.5 = 8

Hunter-Best [27]3 years ago

5 0

The missing numbers would be 12-6

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What is the volume of both shapes ?

Nataly [62]

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3 years ago

What is Perpendicular to 5x-3y=30 and passing through (-2,7)

alisha [4.7K]

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We have:

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