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gavmur [86]
2 years ago
11

Please help me with this math problem!! NO LINKS PLEASE!! Will give brainliest!! :)

Mathematics
1 answer:
ladessa [460]2 years ago
7 0

3x^2 + 2x^2 - 16 = 180

5x^2 = 180 + 16

x^2 = 196/5

= 39.2

x = 6.26

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Q is directly proportional to r.<br> Q is 76 when r is 20.<br> Work out q when r is 45
r-ruslan [8.4K]

Answer:

171

Step-by-step explanation:

Q~r

find k (k is the constant)

Q=kr

76=k×20

76=20k divide 20 on both sides giving you

k=3.8

then Q=k×r

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3 years ago
2 – Efetue:
BartSMP [9]

A) 7x(-5)

A multiplicação de um numero positivo por um numero negativo resulta em um numero negativo: (+) x (-)=(-)

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Multiplique os valores

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Divida os números

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Resposta para C: -3

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Divida os números

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Resposta para D: 5

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