1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondor19780726 [428]
3 years ago
5

2x+7y =3 x= -4y x= y=

Mathematics
2 answers:
Anastasy [175]3 years ago
8 0
Y = -3
X = 12

Substitute the second equation into the first to get y and then using that you can work out x :)
egoroff_w [7]3 years ago
3 0

Answer:

Y=2

x=7

but they all equal 3

You might be interested in
An arithmetic sequence is defined by the general term tn = -5 + (n - 1)78, where n ∈N and n ≥ 1. What is the recursive formula o
Gnoma [55]

Answer:

C

Step-by-step explanation:

In general for arithmetic sequences, recursive formulas are of the form

aₙ = aₙ₋₁ + d,

and the explicit formula (like tₙ in your problem), are of the form

aₙ = a₁ + (n - 1)d,

where d is the common difference. So converting between the two of these isn't so bad. In this case, your problem wants you to have an idea of what t₁ is (well, every answer says it's -5, so there you are) and what tₙ₊₁ is. Using the formulas above and your given tₙ = -5 + (n - 1)78, we can see that the common difference is 78, so no matter what we get ourselves into, the constant being added on at the end should be 78. That automatically throws out answer choice D.

But to narrow it down between the rest of them, you want to use the general form for the recursive formula and substitute (n + 1) for every instance of n. This will let you find tₙ₊₁ to match the requirements of your answer choices. So

tₙ₊₁ = t₍ₙ₊₁₎₋₁ + d ... Simplify the subscript

tₙ₊₁ = tₙ + d

Therefore, your formula for tₙ₊₁ = tₙ + 78, which is answer choice C.

6 0
2 years ago
Read 2 more answers
Ann increased the quantities of all the ingredients in a recipe by 60%, percent. She used 80 grams , of cheese. How much cheese
VladimirAG [237]

Answer:

The recipe originally required 50 grams of cheese.

Step-by-step explanation:

1.6x=80

x=50

3 0
3 years ago
How to do this question plz answer ​
weeeeeb [17]

9514 1404 393

Answer:

  102

Step-by-step explanation:

The total of ratio units is ...

  6 + 3 + 8 = 17

The difference between the Charlie's ratio units and Adrian's ratio units is ...

  8 - 6 = 2

That is, the total number of ratio units is 17/2 = 8.5 times that difference.

The actual difference is 12 sweets, so the total number of sweets is ...

  8.5 × 12 = 102 . . . . total sweets

4 0
3 years ago
10. Find the area of the shaded region.
Semenov [28]

Answer:

Area = 114

Step-by-step explanation:

We first must find the area of the larger outside rectangle.

Area = length × width

15 × 8 = 120

Then we find the area of the smaller inside rectangle.

4 × 1.5 = 6

Since the small rectangle is not shaded we have to subtract its area from the larger shaded rectangle's area.

120 - 6 = 114

8 0
3 years ago
$36,000,000 is what percent of $90,000,000?
jeka57 [31]
$36,000,000 is 40% of $90,000,000. Hope it helps!
6 0
3 years ago
Read 2 more answers
Other questions:
  • Pleaseee!!!! Can somebody please answer my question
    10·1 answer
  • Michael's rock collection is 27% igneous rock. Half of his collection is sedimentary rock, while the rest is metamorphic rock. H
    5·1 answer
  • What is the least common multiple of 12x and 40y
    12·1 answer
  • 21. If there are 6 air conditioners and each require 8 pounds of refrigerant, how many pounds of
    6·1 answer
  • If you cut a 35-inch long stick in the ratio 2:3, how long would each part be?
    6·1 answer
  • What would be GREAT if PEOPLE didnt abandon the question!!
    10·1 answer
  • The floor of a rectangular cage has a length 4 feet greater than its width, w. James
    15·1 answer
  • Find the perimeter P of ▱ABCD with vertices A(−6, 6), B(−2, 6), C(−4, 3), and D(−8, 3). Round your answer to the nearest tenth,
    5·1 answer
  • HELP!!!!! PLEASE!!!!!
    9·2 answers
  • I have the 2nd and last one not sure of the 1st or 3rd
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!