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2 years ago

PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT

Mathematics

2 answers:

Yanka [14]2 years ago

7 0

If im not mistaken
1 is columns
2 is columns
3 less
4 more
its been a long time so i could be wrong

Harman [31]2 years ago

3 0

Elements in the same Group have the same number of valence electrons.

Elements in the same Period have the same number of electron shells.

Metallic elements become Less reactive as you move left to right in a period.

Metallic elements become More reactive as you move top to bottom in a group.

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there are 72 new houses being built in a neighborhood. Last month, 1/3 of them were sold. This month, 5/8 of the remaining house

Nataly_w [17]

Answer:

15 houses

Step-by-step explanation:

1/3 * 72 = 24

5/8 * 24 = 15

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2 years ago

The triangles are similar

hoa [83]

Answer:

Part 1) $x=16\ units$

Part 2) $x=23\ units$

Part 3) $AE=20\ units$

Part 4) $x= 6.25\ units$

Part 5) $x=26.67\ in$

Step-by-step explanation:

Part 1) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{12}{3}=\frac{x}{4}\\\\3x=12*4\\ \\x=48/3\\ \\x=16\ units$

Part 2) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{36}{12}=\frac{39}{(x-10)}\\\\3(x-10)=39\\ \\x=(39/3)+10\\ \\x=23\ units$

Part 3) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{AB}{CD}=\frac{AE}{ED}$

substitute the values

$\frac{10}{4}=\frac{2x+10}{x+3}$

$2.5(x+3)=2x+10$

$2.5x+7.5=2x+10$

$2.5x-2x=10-7.5$

$0.5x=2.5$

$x=5\ units$

$AE=2x+10=2*5+10=20\ units$

Part 4) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{4}{5}=\frac{5}{x}\\ \\4x=5*5\\ \\ x=25/4\\ \\ x= 6.25\ units$

Part 5) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{30}{x}=\frac{45}{40}\\ \\45x=30*40\\ \\x=1,200/45\\ \\ x=26.67\ in$

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2 years ago

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ziro4ka [17]

11/6 , 1/6 and 10/6 are the answer

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2 years ago

Dan's dog-walking job pays $15 per hour. His job as a car-wash attendant pays $400 each week. Dan wants to know how many hours h

KengaRu [80]

Answer:

if his car-wash job gives him $400 then he should only work 8 hours walking dogs to reach 520. Though it says to earn 'more than $520' so maybe 9hrs?

Step-by-step explanation:

He already has $400, which leave $120. 120 divided by 15 equals 8.

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The correct answer is $7.84

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