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2 years ago

+5 when

Mathematics

2 answers:

Troyanec [42]2 years ago

6 0

Replace x with 4
1/2 * 4 + 5
2 + 5 = 7

Mark brainliest please

andrew11 [14]2 years ago

3 0

Answer:

B. 7

Step-by-step explanation:

$\frac{1}{2} \times 4 + 5 = 7 \\ sub \: in \: 4 \: into \: the \: equation$

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A trapezoid has an area of 60 square inches. The height of the trapezoid is 5 inches. What is the length of the longer base if t

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Answer:

Step-by-step explanation:

Remark

Let the shorter base = x

Let the longer base = 3x

h = 5

Area = 60

Formula

Area = (b1 + b2)*h /2

Solution

60 = (x + 3x)*5 / 2 Multiply both sides by 2

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x = 6

Therefore the two bases are

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Step-by-step explanation:

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2 years ago

Consider the baggage check-in process of a small airline. Check-in data indicates that from 9am to 10am, 220 passengers checked

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Answer:

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Step-by-step explanation:

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An aeroplane at an altitude of 200m observes the angle of depression of opposite points on the two banks of a river to be 45 and

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Answer:

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Step-by-step explanation:

It is often helpful to draw a diagram for word problems involving geometric relationships. One for this problem is shown below.

The mnemonic SOH CAH TOA reminds you of the relationship between sides of a right triangle:

Tan = Opposite/Adjacent

Here we're given angles of depression measured from the horizontal (as shown in the diagram), but it is more convenient to use angles measured from the vertical. In particular, ∠BAO is the complement of 60°, and its tangent is the ratio OB/OA:

tan(30°) = OB/OA

OB = (200 m)·tan(30°) ≈ 115.47 m . . . . . . multiply by OA, use OA=200 m

Likewise, we have ...

OC = (200 m)·tan(45°) = 200 m

Then the width of the river is the difference between these values:

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