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Stolb23 [73]
3 years ago
12

I need help with a,b,c, and d

Mathematics
2 answers:
telo118 [61]3 years ago
7 0
A. -4
b. -6
c. 0 if the expression is 6 - 8 + 2  but if it is 6 - 8 ÷ 2 = 2
d. -2.1
OLga [1]3 years ago
6 0
A) -5 +1 =-4
B) 3(5-7)
=3(-2)=-6
C) can’t really see if is plus 2 or divided by 2
So 6-8/2 =-2/2=-1
And if 6-8+2= -2+2=0
D) 6.5+4.3(-2)
=6.5-8.6
=-2.1
Hope this helps!
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Answer:

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Step-by-step explanation:

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Can you help me understand question number 2?
Nostrana [21]

Given:

\{(x,y)|5x-7y

To find:

The test point is in the solution set for the linear inequality.

Solution:

The inequality is

5x-7y

Here, x\in I, y\in I. It means, both x and y both are integers. So, the option D is incorrect because 1.5 and 3.5 are not integers.

For option A, the point is (-2,-1).

Putting x=-2 and y=-1 in the given inequality, we get

5(-2)-7(-1)

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This statement is true. So, the point (-2,-1) is in the solution set.

For option B, the point is (-4,-3).

Putting x=-4 and y=-3 in the given inequality, we get

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1

This statement is false. So, the point (-4,-3) is not in the solution set.

For option C, the point is (-2,-4).

Putting x=-2 and y=-4 in the given inequality, we get

5(-2)-7(-4)

-10+28

18

This statement is false. So, the point (-2,-4) is not in the solution set.

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6 0
3 years ago
Central school is hosting a "central has talent" show . They will award various prizes for the best 3 acts in the show . First p
blondinia [14]
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6 0
4 years ago
Read 2 more answers
X+2y=3<br><br> Y=2x+14 solve the system by the substitution method
madreJ [45]

Answer:

y = 4, x = -5

Step-by-step explanation:

x + 2y = 3\\y = 2x + 14\\

We can solve for x

x = 3 - 2y\\

We can then substitute it into the second equation

y = 2(3-2y) + 14\\y = 6 - 4y + 14\\5y = 20\\y = 4

y = 4, so we can plug that back into the first equation:

x + 2(4) = 3\\x + 8 = 3\\x = -5\\

We can double check:

4 = 2(-5) + 14\\4 = -10 + 14\\14 = 14\\

Since it is true, we know it works

8 0
3 years ago
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