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7nadin3 [17]
3 years ago
10

How many solutions for each system

Mathematics
1 answer:
muminat3 years ago
3 0
Infinitely many is the first one, because you can convert one equation into another one (3x-3y=-18--->  x-y=-6, ---->y=x+6)

second one is one solution, because
y=-4x+11 and y=11+6x,--->-4x+11=11+6x, -4x-6x=0, x=0

third one
y =-2x+5 and y=-7-2x ,-2x+5=-7-2x, --->5=-7 false , no solutions




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Please answer quickly thanks :)))
hammer [34]

move te dotty thing to the midle them sumbtract 5 1/2

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7 0
3 years ago
Which theorem can be used to show that LABC is to LDEC
Vitek1552 [10]
Answer is C. AAS (Theorem)
Reason
Angle angle side - AAS - this figure has two congruent angles (90 degree right angle and vertical angle) and shows tic marks of a congruent non-included side.

Note:
HL is hypotenuse leg, ASA has an included side and SAS has two congruent sides, which are not true for this figure
7 0
2 years ago
Suppose the number of a particular type of bacteria in samples of 1 milliliter (ml) of drinking water tend to be approximately n
Irina-Kira [14]

Answer: 0.0475

Step-by-step explanation:

Let x = random variable that represents the number of a particular type of bacteria in samples of 1 milliliter (ml) of drinking water, such that X is normally distributed.

Given: \mu=85,\ \ \sigma=9

The probability that a given 1-ml will contain more than 100 bacteria will be:

P(X>100)=P(\dfrac{X-\mu}{\sigma}>\dfrac{100-85}{9})\\\\=P(Z>1.67)\ \ \ \ [Z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Zz)=1-P(Z

∴The probability that a given 1-ml will contain more than 100 bacteria

0.0475.

3 0
3 years ago
If two lines are parallel, which statement must be true?
brilliants [131]

Answer:

C. Their slopes are equal.

Step-by-step explanation:

Given : If two lines are parallel.

To find  : which statement must be true.

Solution : We have given that If two lines are parallel.

We know that two parallel line have same slope

By rise over run :

Therefore, C. Their slopes are equal

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
The equation 2(5+7) = (2•5) + (2•7) illustrates what property?
wel

In this question, you're trying to figure out what property is being represented.

Your answer would be the Distributive Property

This is your answer because as you can see, you are "distributing" the 2 to the variables inside the parenthesis.

When you distribute the number, you would be multiplying, in which in this case there is multiplication.

Therefore, Distributive property would be the correct answer.

3 0
3 years ago
Read 2 more answers
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