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3 years ago

I don't know this 17/21 - 2/10

Mathematics

2 answers:

Naily [24]3 years ago

5 0

Answer:64/105

Step-by-step explanation:

Find the lcm of 21 and 10.

170/210 - 42/210

128/210

64/105

Maksim231197 [3]3 years ago

3 0

Answer:

64/105

Step-by-step explanation:

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Lisa's test grades are 79, 89 and 90

Vaselesa [24]

Answer:

Step-by-step explanation:

Equating the mean to the scores :

88 = 79 + 89 + 90 + x / 4
352 = 258 + x
x = <u>94</u>

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2 years ago

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Dolphin 1 dove 200 feet underwater. dolphin 2 dove 30% farther. After dolphin 2 dove down, it ascended 25.50 feet and the descen

fomenos

Answer:230 feet

Step-by-step explanation: Divide 200/30 to find the percentage. 30% of 200 is 15. Add the percentage to 200. Subtract 215 - 25.50. Then add 40.50.

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3 years ago

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Alik [6]

Answer:

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2 years ago

How many triangles can be constructed with the following measures?

sleet_krkn [62]

I got the answer by adding the triangles

4 0

2 years ago

Someone PLEASEEEE HELPPPP

igomit [66]

Answer:

x = 18√3

Step-by-step explanation:

From the picture attached,

In a right triangle,

Measure of one angle = 30°

Measure of adjacent side of the angle = 9 units

We have to find the measure of Hypotenuse from the given properties.

By cosine rule,

cos(30°) = $\frac{\text{Adjacent side}}{\text{Hypotenuse}}$

$\frac{\sqrt{3}}{2} =\frac{9}{x}$

$x=18\sqrt{3}$

Therefore, measure of Hypotenuse is 18√3 units.

3 0

3 years ago