3 years ago

What is the value of the following expression? -9/4➕-8/5-2 1/2

Mathematics

1 answer:

SOVA2 [1]3 years ago

3 0

The answer to the expression is -97/20 or -4.85

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Find the common ratio of the geometric sequence 11, -55, 275,...11,−55,275,...

Kaylis [27]

Answer:

r = -5

Step-by-step explanation:

common ratio (r) is found be dividing one term by its preceding term:

r = 275 ÷ -55 = -5

or, r = -55 ÷ 11 = -5

Therefore, r = -5

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A soccer team drank 7 gallons of water during the first 3 games this season. At this rate, about how many gallons of water will

andrezito [222]

The answer would be 77.

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Joshua is 1.45 meters tall. At 2 p.m., he measures the length of a tree's shadow to be 31.65 meters. He stands 26.2 meters away

Lena [83]

Answer:

The height of the tree=8.42 m

Step-by-step explanation:

We are given that

Height of Joshua, h=1.45 m

Length of tree's shadow, L=31.65 m

Distance between tree and Joshua=26.2 m

We have to find the height of the tree.

BC=26.2 m

BD=31.65m

CD=BD-BC

CD=31.65-26.2=5.45 m

EC=1.45 m

All right triangles are similar .When two triangles are similar then the ratio of their corresponding sides are equal.

$\triangle ABD\sim \triangle ECD$

$\frac{AB}{EC}=\frac{BD}{CD}$

Substitute the values

$\frac{AB}{1.45}=\frac{31.65}{5.45}$

$AB=\frac{31.65\times 1.45}{5.45}$

$AB=8.42m$

Hence, the height of the tree=8.42 m

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3 years ago

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jonny [76]

Answer:

45in.

Step-by-step explanation:

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jessie has some chickens and rabbits. there are 30 heads and 76 legs in all. How many chickens and rabbits does jessie have?

Nataly_w [17]

Answer:106

Step-by-step explanation:

30+76=106

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3 years ago