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2 years ago

How do I solve this system of equations by adding, subtracting, or multiplying? x-y=8;x+y=12

1 answer:

Natasha2012 [34]2 years ago

7 0

By substitution.
Get y or x alone then insert it into the other equation solving for one of the two variables. After that substitute ur answer into one of the equations then solve.

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Wirte an inequality to comepare the ratios 2/4 and 5/6

polet [3.4K]

The inequality is < so 2/4 < 5/6.

5 0

2 years ago

A realtor listed a house that was 45 yards by 10 yards..What is the total square footage of the house

Alex17521 [72]

4050 ft is the total square footage of the house.

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3 years ago

Jane and 3 friends decided to split the cost of a pizza evenly. The total cost was $25.48. How much does each friend have to pay

erma4kov [3.2K]

Answer:

$6.37

Step-by-step explanation:

Jane and 3 friends = Jane + another 3 people

= 4 people in total

Total Cost of pizza = $25.48

If 4 people split $25.48 evenly,

Amount each friend has to pay = Total Cost of pizza/Total number of people

= $25.48/4

= $6.37 per friend

Each friend has to pay $6.37 each if $25.48 is splitted evenly amongst them

6 0

3 years ago

Find the values of x, y, and z. The diagram is not to scale.

Kruka [31]

we know that

The sum of the internal angles in the triangle must be $180$ degrees

see the attached figure with letters to better understand the problem

Step $1$

Find the measure of the angle x

In the triangle ABC

$63\°+36\°+x\°=180\°$

solve for x

$99\°+x\°=180\°$

$x\°=180\°-99\°$

$x=81\°$

therefore

the answer Part a) is

the measure of angle x is $81\°$

Step $2$

Find the measure of the angle z

we know that

$x+z=180\°$ --------> by supplementary angles

substitute the value of x

$81\°+z=180\°$

$z=180\°-81\°$

$z=99\°$

therefore

the answer Part b) is

the measure of angle z is $99\°$

Step $3$

Find the measure of the angle y

In the triangle ACD

$13\°+z\°+y\°=180\°$

solve for y

$13\°+99\°+y\°=180\°$

$112\°+y\°=180\°$

$y\°=180\°-112\°$

$y\°=68\°$

therefore

the answer Part c) is

the measure of angle y is $68\°$

5 0

2 years ago

Read 2 more answers

1/2 Of the class has blonde hair and 1/4 the class has black hair.1/4 of the class has brown hair If there are 32 kids in the cl

Mariulka [41]

Answer:

Step-by-step explanation:

so there is 32 kids....1/2 are blonde, 1/4 have black hair, 1/4 have brown hair

1/2(32) = 32/2 = 16 are blonde

1/4(32) = 32/4 = 8 have black hair

1/4(32) = 32/4 = 8 have brown hair

6 0

2 years ago