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Lemur [1.5K]
3 years ago
13

(05.02)

Mathematics
1 answer:
MaRussiya [10]3 years ago
6 0

Answer:

Answer choice a.

Step-by-step explanation:

Let's do part of the work of solving the given system:

6x + 2y = −6

3x − 4y = −18

Multiply the first equation by 2 so as to make the coefficient of y = to 4:

12x + 4y = -12

Combine this result with the second equation:

12x + 4y = -12

3x − 4y = −18

------------------------

 15x = -30

Note that these results are precisely the same as the equations in Answer Choice a.

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three friends are in the same algebra class. Their scores on a recent test are three consecutive odd intergers whose sum is 279.
jasenka [17]
X= 1st integer
x+2= 2nd integer
x+4= 3rd integer

Add the integers together

x + (x + 2) + (x + 4)= 279
combine like terms
3x + 6= 279
subtract 6 from both sides
3x= 273
divide both sides by 3
x= 91 first integer

Substitute x=91 to find 2nd & 3rd integers

2nd Integer
=x+2
=91+2
=93

3rd Integer
=x+4
=91+4
=95

ANSWER: The three test scores are 91, 93 and 95.

Hope this helps! :)
7 0
2 years ago
If there are 104 ounces in 2 quarts, how many quarts are there in 260 ounces?
Maslowich

Answer:

5

Step-by-step explanation:

104 oz = 2 q

divide by 2

52 oz= 1 q

now take 260 oz / 52 oz

5 quarts

5 0
3 years ago
The price of a ceramic bead necklace (Y) is directly proportional to the number of beads (x) on the necklace. Using the graph, w
Annette [7]

Answer: C) (1,0.80) represents the unit rate. E) (25,20) represents the price of a necklace with 25 beads

Step-by-step explanation:

(1, 0.80) represents the unit rate.

(25, 20) represents the price of a necklace with 25 beads.

\frac{y}{x} = unit rate → \frac{4}{5} = 0.80; \frac{12}{15} = 0.80; \frac{16}{20} = 0.80

Point (1, r) → (1, 0.80) represents the unit rate.

25(0.80) = 20; thus, (25, 20) represents the price of 25 beads.

Hope this helps

8 0
2 years ago
Write the standard equation for the circle center (-6, 7), r= 9.
Oduvanchick [21]

Answer:

(×+6)^2 + (y -7 ) ^2=81

Step-by-step explanation:

hope this helps

3 0
2 years ago
(07.05 LC) What is the value of x in the equation −x = 2 − 3x + 6? (5 points) A. 8 B.4 C. −4 D. −8
Paraphin [41]

Answer: B (x = 4)

- x = 2 - 3x + 6  combine like terms

- x = -3x + 8      add 3x

2x = 8               divide by 2

x = 4

5 0
3 years ago
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