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3 years ago

I need help for my class

Mathematics

1 answer:

Nookie1986 [14]3 years ago

8 0

Answer:

Step-by-step explanation:

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1 year ago

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3y -7y + 18x + y + 21x + 9 - 13 Simplify the expression

Leviafan [203]

Answer:

-3y+39x-4

Step-by-step explanation:

3y minus 7y plus y is -3y. 18x plus 21x is 39x. 9 minus 13 is -4

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2 years ago

A group of tourists spend $168 to rent snorkels and find. A total of 10 snorkels and 12 pairs of fins are rented. Renting a snor

WITCHER [35]

Answer:

Cost to a rent a snorkel $=\$ 12$ , Cost on 10 rent snorkel $=\$ 120$

Step-by-step explanation:

Given,

Tourist spend on rent snorkel and fin= $\$ 168$

10 snorkel and 12 pairs of fin

Let the cost to rent a snorkel be = $\$$ x

and cost of a pair of fin is = $\$$ y

x=3y (given condition)

$10x+12y=168$

$10\times 3y+12y=168$

$30y+12y=168$

$42y=168$

$y=168/42$

$y=4$

Cost of a pair of fin= $y=\$ 4$

$x=3y$

$x=3\times 4$

$x=12$

Cost of rent a snorkel $=\$ 12$

Total cost of a rent snorkel

$=10\times 12$

= $\$ 168$

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2 years ago

Solve the system using elimination. 5x + 8y = –29 7x – 2y = –67

Snowcat [4.5K]

7x-2y+-67
multiply both sides of the bottom by 4 and add 5x+8y=-29 
 28x-8y=268

33x=-297
 x=-9 

5(-9) +8y= -29 
-45 +8y =-29 
8y= 16 
y=2

8 0

3 years ago