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Sloan [31]
4 years ago
6

Please help 20 point and brainliest

Mathematics
2 answers:
7nadin3 [17]4 years ago
8 0
X=-2 and y=3.

The first step we take is to substitute the value for y from the second equation into the first equation:
4x+5(3x+9)=7

This is justified by substitution.  The next step is:
4x+5*3x+5*9=7
4x+15x+45=7

This is justified by the distributive property.  The next step is:
19x+45=7

This is justified by addition of like terms.  The next step is:
19x+45-45=7-45
19x=-38

This is justified by the subtraction property of equality.  The next step is:
19x/19 = -38/19
x=-2

This is justified by the division property of equality.  The next step is:
y=3(-2)+9
y=-6+9
y=3

This is justified by substitution, multiplication and addition, in that order.
nikdorinn [45]4 years ago
8 0

Answer: I took the test Thank God I got at least a 98%, Here is the answer :D hope I helped

Step-by-step explanation:

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oee [108]

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Wednesday

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3 years ago
Assume a significance level of α=0.05 and use the given information to complete parts​ (a) and​ (b) below.
Roman55 [17]

Answer:

A.Reject Upper H0 because the​ P-value is less than or equal to to α.

B.There is sufficient evidence to support the claim that the percentage of adults that would erase all of their personal information online if they could is more than 51​%.

Step-by-step explanation:

Given the claim :

Less than 51% will erase their personal information :

We take this as the null ;

H0 < 0.51 ;

Alternative hypothesis which is the opposite of the Null

H1 > 0.51

P value = 0.0148

α = 0.05

At α = 0.05 ; if p value is less than α ; reject the the Null

If p value is greater than Null ; then we fail to reject the Null

Pvalue < α

The P value is less than 0.05; then we reject the Null

B.) There is significance evidence to support the Alternative hypothesis claim, that the percentage of adult that would erase all their personal information online if they could is more Than 51%

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3 years ago
Please help me :( *also what school do y'all go to?*
Veronika [31]

Answer:

3

Step-by-step explanation:

Because 30 divided by 5 =6 which is the miles so divide 15 by 5 and the minutes are 6 so 6x5 so 3

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