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2 years ago

Select the number that is a multiple of two a 31 b 57 c 85 d 98

Mathematics

2 answers:

Lynna [10]2 years ago

6 0

Answer:

Step-by-step explanation:

option d..............

liraira [26]2 years ago

3 0

The answer is 98 because if you multiply 2 x 49 you will get 98

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A=? B=? ({[correct answer marked BRAINLIEST]})

Alinara [238K]

Step-by-step explanation:

a= 16x+3-14x+15

combine like terms, 16x-14x= 2x

so,

2x+3+15,

15+3=18

18=2x, divide 18 by 2

x=9

b) *open the parenthesis* -1/6 *24x = -4x

-1/6*60 = -10

-4x- (-10)= -4x+10

-4x+10+2x= -4x+2x= -2x

-2x=10 = 2x=-10 = x=-5

Cheers!

6 0

2 years ago

Read 2 more answers

C2 = 39 (c squared) please help :(

iVinArrow [24]

Answer:

$\boxed{c = \sqrt{39} / c= - \sqrt{39} }$

This " / " means or, btw!

Step-by-step explanation:

$c^2 = 39$

⇒Take square root.

$c =$ ± $\sqrt{39}$

$c = \sqrt{39}$ or $c = -\sqrt{39}$

Hope this helped you!

7 0

2 years ago

If pencils sell at 6 for 59 cents how many pencils can be bought for 2.95

Olegator [25]

We already know from the given data that 6 pencils can be bought for 59 cents. We have to determine the number of pencils that can be bought for $2.95.
So
Price of 6 pencils = 59 cents.
Price of 1 pencil = (59/6) cents
   = 9.83 cents
Now total amount in hand for buying pencils = $2.95
   = 295 cents
Then the number of pencils that can be bought for 295 cents = (295/9.83)
   = 30.01
So the maximum number of pencils that can be bought for $2.95 is 30 pencils.

4 0

3 years ago

Read 2 more answers

Need Help Badly!!!!!! The dot plot below shows the number of books 26 students read in a month: Dot plot labeled Number of Books

algol13

The dot plot below shows the number of books 26 students read in a month:

Is the median or the mean a better center for this data and why? help plz

7 0

2 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