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
andrezito [222]
3 years ago
12

PLEASE HELP!!!!

Mathematics
1 answer:
alina1380 [7]3 years ago
7 0

Answer:

B, D, E  

Step-by-step explanation:

-8x  -  6y = 10

  x + 7y =    9

You can multiply any of these equations by a constant without changing the solution.

B. 4x + 3y = -10 is equivalent to multiplying each side of the first equation by -½.

D. -16x - 12y = 20 is equivalent to multiplying each side of the first equation by 2.

E. 3x + 21y = 27 is equivalent to multiplying each side of the second equation by 3.

A. -2x + 7y = 9 is wrong. The signs don't match those of the second equation.

C. 24x + 18y = 10 is wrong. The signs don't match those of the first equation.

F. x - 14y = -18 is wrong. The coefficient of x should be -2.

You might be interested in
Evaluate: -(-1) + (-7) + (2) - (-4) - (-2) A) -2 B) 0 C) 1 D) 2'
Masja [62]

Answer:

2

Step-by-step explanation:

-(-1) + (-7) + (2) - (-4) - (-2) =

= 1 + (-7) + 2 + 4 + 2

= -6 + 2 + 4 + 2

= -4 + 4 + 2

= 0 + 2

= 2

6 0
3 years ago
The area of rectangular field is (49m2-42m+9).Find the dimensions of the field
Drupady [299]

Answer:

The dimensions are (7m-3) by (7m-3)

Step-by-step explanation:

We have the area of the rectangular field to be:

49 {m}^{2}  - 42m + 9

We need to factorize this expression.

Let us rewrite to obtain:

{(7m)}^{2}  - 2(7 \times 3)m +  {3}^{2}

We can easily see that the expression is actually a perfect square trinomial.

This gives us:

(7m - 3)^{2}

Or

(7m - 3)(7m - 3)

6 0
3 years ago
The digit which has a value of tenth in 35.427 is
inna [77]

Answer:

4

Step-by-step explanation:

35.427 the tens place is after 35. and four is there, so 4 is in the tenths place

8 0
3 years ago
There are a rack of 14 billiard balls. Balls numbered 1 through 8 are solid-colored. Balls numbered 9 through 14 contain stripes
Jet001 [13]

Answer:

3/7  /    42.8% chance

Step-by-step explanation:

There are 6 striped balls (9, 10, 11, 12, 13, 14) and 8 (1, 2, 3, 4, 5, 6, 7, 8) solid colored balls. So, 6 / 14 balls are striped.

(6 / 14  = 3 / 7)

this means that the probability of a ball being striped has the odds of 3/7

(3/7 = about 42.8% chance)

6 0
2 years ago
Answer all and maybe you can get brainest
zhannawk [14.2K]
-1
29
-46
-46
27
-28
13
-1
-16
38

15
86
-63
-20
-17
-60
87
-36
-16
-42

18
-9
-63
-49
22
-15
-20
-74
27
53

Goes by row, up to down
6 0
3 years ago
Read 2 more answers
Other questions:
  • Write the percent as a decimal 0.12%
    6·1 answer
  • PLEASE HELP AND SHOW WORK!! i'm terrible, literally terrible at math, just explain it to me, please ? i need both x and y!
    11·1 answer
  • Product A is an 8oz. Bottle of cough medicine that sells for $1.36. Product B is a 16oz. Bottle cough medicine that costs $3.20.
    15·2 answers
  • In a recipe for cookies the ratio of flour to sugar is 3:1 what ratios are equivalent
    12·1 answer
  • If an object has a density of 6.g/mL and you put it into water, will it sink or float?​
    10·1 answer
  • “Toyota said it would still post a small net profit of $555 million, thanks to outside dividend income.”
    5·1 answer
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-%203%7D%7Bx%20-%2010%20%7D%20%20%3D%20%20%5Cfrac%7B4%7D%7Bx%20%2B%204%7D%20"
    6·1 answer
  • Type the correct answer in the box.
    9·1 answer
  • How to solve this? 10x+4y &lt; 12 8x-3y &gt; 20
    11·1 answer
  • A grocer purchased 200 eggs at rs.9each. 20 of them were broken and he/she sold the rest at rs.9.50 each.Find his /her profit or
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!