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horrorfan [7]
3 years ago
14

9y -4y+3 if y =7 solve this

Mathematics
1 answer:
BigorU [14]3 years ago
5 0
Plug 7 into each y. 9(7) -4(7) +3
63-28+3
The answer is 38
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The perimeter of a square is 36 inches. Find the length of a diagonal
sergey [27]
The length of a diagonal is nine inches because it is the same length as the side length.
4 0
3 years ago
Samuel and Christopher go to the movie theater and purchase refreshments for their friends. Samuel spends a total of $34.00 on 6
Llana [10]

Answer:

The system of equations is :

6 p + 4 d = 34

12 p + 7 d = 66.25

The price of a drink is $1.75

Step-by-step explanation:

Assume that the price of one bag of popcorn is $p and the price of a drink is $d

∵ Samuel spends a total of $34 on 6 bags of popcorn and

   4 drinks

- Multiply p by 6 and d by 4, then add the products and equate

    the sum by 34

∴ 6 p + 4 d = 34 ⇒ (1)

∵ Christopher spends a total of $66.25 on 12 bags of popcorn

    and 7 drinks

- Multiply p by 12 and d by 7, then add the products and equate

    the sum by 66.25

∴ 12 p + 7 d = 66.25 ⇒ (2)

The system of equations is :

6 p + 4 d = 34

12 p + 7 d = 66.25

Now let us solve it

Multiply equation (1) by -2 to make the coefficients of p in the two equations equal in values and opposite in signs to eliminate it

∵ -12 p - 8 d = - 68 ⇒ (3)

- Add equations (2) and (3)

∴ - d = - 1.75

- Divide both sides by -1

∴ d = 1.75

The price of a drink is $1.75

7 0
3 years ago
Help me please help me thank you
Eddi Din [679]

Answer:

1. The sum of interior angles of a pentagon is 180 but here the sum of angles of this pentagon is 550 . So it is wrong.

2. Angle 145 is equal to the corresponding of angle y. So angle y is 145 degree.So according to opposite angle theorem, angle x is also 145 degree.

Sorry I do not know next question solutions.

6 0
3 years ago
A rectangle has a length of 8m and a width of 3m. If a similar rectangle has
jarptica [38.1K]

Answer:

8.25 m

Step-by-step explanation:

the scale is 2.75

Hope this helps UwU

3 0
2 years ago
Gracie is rewriting the expression (24 + 40) as an integer times the sum of two integers. By factoring out a 2, she knows she ca
laila [671]
Hi
step-by-step
yun lang po
#carryonlearning!
6 0
2 years ago
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