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Darya [45]
3 years ago
10

Identify the property used to simplify the following expression. (7 + x) + 1 = 7 + (x + 1) a) Associative Property of addition b

) Commutative Property of Addition c) Identity Property of Addition d) Distributive Property
Mathematics
2 answers:
gayaneshka [121]3 years ago
7 0
Associative Property of Addition
mariarad [96]3 years ago
5 0
<span> a) Associative Property of addition </span>
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In triangle ABC, angle A is 75o and angle B is 20o. Select the triangle that is similar to triangle ABC.
Arturiano [62]

Answer:

A. \triangleDEF where \angle D = 75^{\circ} and \angle E = 20^{\circ}.

Step-by-step explanation:

At first we must keep in mind that two triangles are similar when they have same angle configuration, that is, each pair of angles is congruent. If \triangleABC and \triangleDEF, then \angle A \equiv \angle D and \angle B \equiv \angle E. Hence, \angle D = 75^{\circ} and \angle E = 20^{\circ}.

In a nutshell, correct answer is A.

4 0
3 years ago
When exercising, the maximum heart rate (r ) in beats per minute is modeled by the equation shown in the box, where (a ) represe
worty [1.4K]

Answer:

186 beats per minute

Step-by-step explanation:

The maximum heart rate (r ) in beats per minute is modeled by the equation :

r = 220 - a ...(1)

Where

a is age of the person in years

If Sanchez age is, a = 34 years

Put a = 34 in equation (1)

r = 220 - 34

= 186 beats per minute

Hence, the maximum heart rate is 186 beats per minute.

7 0
3 years ago
Durning Saturday’s thunderstorms a total of 500 mm of rain fell in fell in 20 minutes.How many mm fell per minute
Sonja [21]

Answer

25mm of rain fell each second

Step-by-step explanation:

we know that 500 mm fell in 20 minutes

so, we have to divide 500 by 20 giving us the amount of rain that fell each minute:

500/20 = 25

therefore, 25mm of rain fell each minute

hope this helped:)

5 0
3 years ago
Read 2 more answers
A train picked up 20 people at station A. At station B 15 people got off and 3 people got on. How many people are on the train n
Step2247 [10]

Answer:

There are 8 people on the train.

Step-by-step explanation:

20 - 15 = 5

5 + 3 = 8

7 0
3 years ago
How many diagonals are in a polygon with 14 sides.
Akimi4 [234]
I think it's 77 sides
5 0
3 years ago
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