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2 years ago

Can someone help me with these

Mathematics

1 answer:

Dafna1 [17]2 years ago

8 0

Answer:

for the triangle question the ans is 2

for the equation question where u have to find the mistake the student made, its the last option

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In one day a museum collected $1590 from 321 people. The price of admission is $6 for an adult and $4 for a child. How many adul

Troyanec [42]

Answer:

153 adults and 168 children

Step-by-step explanation:

x - number of adults

y - number of children

$\left \{ {{6x + 4y = 1590} \atop {x + y = 321}} \right.$

$\left \{ {{6x+4y = 1590} \atop {x=321-y}} \right.$

$\left \{ {{6*(321 - y)+4y = 1590} \atop {x=321-y}} \right.$

$\left \{ {{1926 -6y+4y=1590} \atop {x=321-y}} \right.$

$\left \{ {{1926 -2y=1590} \atop {x=321-y}} \right.$

$\left \{ {{-2y=1590-1926} \atop {x=321-y}} \right.$

$\left \{ {{-2y=-336} \atop {x=321-y}} \right.$

$\left \{ {{y=168} \atop {x=321-y}} \right.$

$\left \{ {{y=168} \atop {x=321-168}} \right.$

$\left \{ {{y=168} \atop {x=153}} \right.$

Is it all clear?

6 0

3 years ago

PLEASE HELP!!! Solve. a - 2b = 2 a + b = 2 ( b + 3 )

wolverine [178]

a-2b=2.........(1)

a+b=2(b+3)

a+b=2b+6

a-b=6.......(2)

a-2b= 2

a-b= 6

Eliminate y

multiply (1)by -1

Multiply (2) by 2

-a+2b=-2

2a-2b=12

Add the two equations

a = 10

plug value of a in (1)

1a +-2b=2

10+-2b=2

-2b =2

-2b =-8

b=4.00

Hope this helped:)

3 0

4 years ago

May you please help me.

Assoli18 [71]

Answer:

x=16

Step-by-step explanation:

multiply the 3 to cancel it out

now you have x+2=18

then you subtract by 2 to cancel it out

so now you are left with x=16

7 0

3 years ago

Help I don’t know the answer

mihalych1998 [28]

Supplementary angles are 1 and 2 because they equal 180.
The vertical angles are angles 4 and 2 because they are opposite from each other.

8 0

4 years ago

3 parentheses 2 minus 2 parentheses 3 parentheses 20 minus 2 parentheses

Monica [59]

Answer:

3(2-2) * 3(20-2)

3(0) * 3(18)

0 * 54 = 0

Step-by-step explanation:

3(2-2) * 3(20-2)

3(0) * 3(18)

0 * 54 = 0

5 0

3 years ago