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y = 2x + 5, Calculate x when y = 4

y = 2x + 5 y = 4, therefore 2x + 5 = 4 2x = 1 x = 1/2

JT
Answered by Jacob T. Maths tutor
2980 Views

A man stands 9 metres from the base of a tree. He knows the distance from where he is standing and the top of the tree is 15 metres. How tall is the tree?

a2 + b2 = c2

a : 9       b : unknown      c: 15

b=c- a2

so b2 = 225 - 81

=144 so b=12

JM
Answered by Jack M. Maths tutor
2956 Views

Describe and Explain one or more landforms produced by coastal depositon:

Material is deposited by constructive waves when waves no longer have enough energy to transport the material or there is an increase in the amount of eroded material being carried leading to the formatio...

PM
Answered by Polly M. Geography tutor
4455 Views

The mean of 5 numbers is 42. The 5 numbers are 45,29,63,42 and X. Find the value of X.

42 x 5 = 210.

45+29+63+42 = 179.

210 - 179 = 31

X = 31

JF
Answered by Joseph F. Maths tutor
4304 Views

How do you know when to use the imperfect tense and the preterite tense?

There are two simple past tenses in Spanish: the imperfect and the preterite tenses.

The imperfect tense is used to describe continuous past actions, something which used to happen or to describe w...

KD
Answered by Kieran D. Spanish tutor
1883 Views

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