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Anika [276]
3 years ago
10

What value of x satisfies the system of equations {2x+5y=35x=−10−15y? Enter your answer as the correct value for x, like this: 4

2
Mathematics
1 answer:
Nata [24]3 years ago
7 0

Answer:

x = 23

Step-by-step explanation:

2x + 5y = 35 * (-3) ------>  -6x -15y = -105 (A)

x = -10 - 15y -----> x + 15y = -10 (B)

(A) + (B)

-5x = -115

x = 23

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numerele a, b si c sunt direct proportionale cu 2, 3 si 5. Daca media aritmetica a celor trei numere este egala cu 100, determin
Fynjy0 [20]

Answer:

a = 60

b = 90

c = 150

Step-by-step explanation:

Numerele a, b și c sunt direct proporționale cu 2, 3 și 5.

Unde k este constantă de proporționalitate

a ∝ 2

a = 2k

b ∝ 3

b = 3k

c ∝ 5

c = 5k

Dacă media aritmetică a celor trei numere este egală cu 100, determinați numerele a, b și c

= 2k + 3k + 5k / 3 = 100

= 10k / 3 = 100

Cross Multiply

= 10k = 3 × 100

= 10k = 300

Împărțiți ambele părți la 10

k = 300/10

k = 30

Pentru numărul a

a = 2k

a = 2 × 30

a = 60

Pentru numărul b

b = 3k

b = 3 × 30

b = 90

Pentru numărul c

c = 5k

c = 5 × 30

c = 150

Prin urmare, a = 60, b = 90, c = 150

3 0
4 years ago
The ratio of pens to pencils in Mrs. Bosworth's desk is 4:1. What does this mean?
anzhelika [568]
If there are 4 pens there will be 1 pencil, if there is 1 pencil there will be 4 pens
If the ratio is factored to a number, let's say 3, then there will be 12 pens for every 3 pencils
4 0
3 years ago
Simplify the expression of 1.2x + 3y - 3 - 4.7x by combining like terms. ASAP
EastWind [94]

Answer:

-3.5x + 3y - 3

Step-by-step explanation:

1.2x + 3y - 3 - 4.7x

=> -3.5x + 3y - 3

Therefore, our simplified expression is -3.5x + 3y - 3

Hoped this helped.

5 0
2 years ago
Read 2 more answers
An angle measure is 6 degrees more than 3 times its compliment. find the measure of the angle.
cupoosta [38]
Let the first angle be A and the second be B.
Complementary angles add up to 90° so:
A + B = 90
We are also told:
A = 6 + 3B; substituting this into the first equation:
6 + 3B + B = 90
B = 21°

A = 6 + 3(21)
A = 69°
8 0
3 years ago
–3x + 1 + 10x = x + 4
lyudmila [28]
Your answer is 0.25, bro
7 0
3 years ago
Read 2 more answers
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