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Ira Lisetskai [31]
2 years ago
5

3. Use substitution to solve the system of

Mathematics
1 answer:
Aleksandr-060686 [28]2 years ago
5 0

Answer:

infinite solutions

Step-by-step explanation:

the lines are coincident, so there are infinite solutions

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What is the approximate 47? Give your answer and explain why it is correct. HELP
a_sh-v [17]

Answer:

7

Step-by-step explanation:

7 is approximate to \sqrt{47} because 7 is \sqrt{49}, and 49 is close to 47

3 0
3 years ago
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85% of all cars sold in chicago are some color other than black. if three hundred black cars were sold in chicago, how many cars
hram777 [196]
Of 85% of cars sold where not black then 100-85% where black = 15%
let the number of cars sold be y
then 15%*y=300
y= 300 divided by 15%
= (300*100)/15
=2000
therefore 2000 cars were sold
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3 years ago
What multiplies to 30 but adds to -7
FinnZ [79.3K]

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2 years ago
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Number 5 has me going crazy, plz help
Ber [7]
Well, the amount of degrees is 1,980, so plug that in so that the equation is 1980 = (n-2)180. Then, do order of operations. Divide 1980/180, which is 11. Then, just add 2. So, the polygon has 13 sides.
7 0
3 years ago
Andy bought 4 hamburgers snd 2 milkshakes for $13.50. Danny bought 3 hamburgers and 1 milkshake for $9.25. What cost of a hambur
Molodets [167]

A hamburger costs $2.5 and a milkshake costs $1.75

Step-by-step explanation:

  • Step 1: Form equations from the given details. Let cost of 1 hamburger be H and cost of 1 milkshake be M.

   4H + 2M = 13.50 ------ (1)

&  3H + 1M =   9.25 ------ (2)

  • Step 2: Multiply eq(2) with 2 to make coefficients of M equal.

   6H + 2M = 18.50 ------- (3)

  • Step 3: Subtract eq(3) from eq(1)

⇒ - 2H = - 5

⇒ H = $2.5

  • Step 4: Substitute value of H in eq(2) to find M.

⇒ 3 × 2.5 + M = 9.25

⇒ 7.5 + M = 9.25

⇒ M = $1.75

4 0
2 years ago
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