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Gnom [1K]
3 years ago
15

Which equation satisfies all three pairs of a and b values listed in the table?

Mathematics
2 answers:
dedylja [7]3 years ago
8 0
The correct answer above would be C.

NikAS [45]3 years ago
7 0

Answer:

the correct awsner to the problem above is c

Step-by-step explanation:


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1,418÷22 in compatible numbers?With Two estimates!
Pavel [41]
When you mean estimate do you mean by rounding the first numbers?
5 0
3 years ago
Consider the following system of equations:
Mashutka [201]

Answer:

Liney=-2x+3 intersects line y=x-5

Step-by-step explanation:

We are given that

y=-2x+3

y=x-5

Subtract one equation from other then we get

-3x+8=0

3x=8

x=\frac{8}{3}

Substitute the value of x in first equation then we get

y=-2(\frac{8}{3})+3=-\frac{16}{3}+3=-\frac{-7}{3}

Hence, the solution (\frac{8}{3},-\frac{7}{3}) is the intersection point of two line  equations .

Answer:Liney=-2x+3 intersects line y=x-5

6 0
3 years ago
It is desired to compare the hourly rate of an entry-level job in two fast-food chains. Eight locations for each chain are rando
notka56 [123]

Answer:

It can be concluded that at 5% significance level that there is no difference in the amount paid by chain A and chain B for the job under consideration

Step by Step Solution:

The given data are;

Chain A 4.25, 4.75, 3.80, 4.50, 3.90, 5.00, 4.00, 3.80

Chain B 4.60, 4.65, 3.85, 4.00, 4.80, 4.00, 4.50, 3.65

Using the functions of Microsoft Excel, we get;

The mean hourly rate for fast-food Chain A, \overline x_1 = 4.25

The standard deviation hourly rate for fast-food Chain A, s₁ = 0.457478

The mean hourly rate for fast-food Chain B, \overline x_2 = 4.25625

The standard deviation hourly rate for fast-food Chain B, s₂ = 0.429649

The significance level, α = 5%

The null hypothesis, H₀:  \overline x_1 = \overline x_2

The alternative hypothesis, Hₐ:  \overline x_1 ≠ \overline x_2

The pooled variance, S_p^2, is given as follows;

S_p^2 = \dfrac{s_1^2 \cdot (n_1 - 1) + s_2^2\cdot (n_2-1)}{(n_1 - 1)+ (n_2 -1)}

Therefore, we have;

S_p^2 = \dfrac{0.457478^2 \cdot (8 - 1) + 0.429649^2\cdot (8-1)}{(8 - 1)+ (8 -1)} \approx 0.19682

The test statistic is given as follows;

t=\dfrac{(\bar{x}_{1}-\bar{x}_{2})}{\sqrt{S_{p}^{2} \cdot \left(\dfrac{1 }{n_{1}}+\dfrac{1}{n_{2}}\right)}}

Therefore, we have;

t=\dfrac{(4.25-4.25625)}{\sqrt{0.19682 \times \left(\dfrac{1 }{8}+\dfrac{1}{8}\right)}} \approx -0.028176

The degrees of freedom, df = n₁ + n₂ - 2 = 8 + 8 - 2 = 14

At 5% significance level, the critical t = 2.145

Therefore, given that the absolute value of the test statistic is less than the critical 't', we fail to reject the null hypothesis and it can be concluded that at 5% significance level that chain A pays the same as chain B for the job under consideration

3 0
2 years ago
Solve for x.<br><br> −8 = 2/3x<br><br> A) −6 <br> B) −9 <br> C) −12 <br> D) −24
Reil [10]

Answer:

C. -12

Step-by-step explanation:

divide each side by 2/3

2/3x ÷ 2/3 = x

-8 ÷ 2/3 = -12

x = -12

7 0
3 years ago
Please help solve this with working out :)
Anastaziya [24]
I hope this can help u

3 0
3 years ago
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