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3 years ago

Which expression represents, six times a number plus 8 times a number?

Mathematics

2 answers:

FinnZ [79.3K]3 years ago

5 0

The answer is 6a+8b, so *D*, hope it helps!

Arada [10]3 years ago

3 0

6a+8b; when a variable is next to a coefficient then that means they are multiplying each other, we just don't know what a or b is.

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Two slits are illuminated by a 348 nm light. The angle between the zeroth-order bright band at the center of the screen and the

Andre45 [30]

Answer:0.369 m

Step-by-step explanation:

Given

Distance between slit and screen is $D=154 cm$

Wavelength $\lambda =348 nm$

Angle between zeroth order bright fringe and Fourth-order bright fringe is $\theta =13.5^{\circ}$

let distance between the slits be d

Distance of n th bright fringe From central Fringe is given by

$y_n=\frac{nD\lambda }{d}$

Also $\tan \theta =\frac{y_4}{D}$

$y_4=\tan (13.5)\cdot 1.54$

$y_4=0.24\times 1.54$

$y_4=0.369 m$

5 0

3 years ago

3x+1+5x=7+15+7x what is x?

LenKa [72]

Answer: x=21

Step-by-step explanation:

To solve for x you must first combine you like terms on each side of the equal sign. So you problem will become 8x+1=22+7x. Then get your x on one side and your numbers on the other by taking the one away from the right side and 1 away from 22. Then take away 7 from the left side to cancel it out. Then take 7x away from 8x to leave you with x. making your answer x=21

3 0

3 years ago

Read 2 more answers

Jordan is driving to a concert and needs to pay for parking. There is an automatic fee of $11 just to enter the parking lot, and

Mashcka [7]

Answer:

11+(2×4)

11+8

$19....

7 0

3 years ago

Read 2 more answers

Is (2,3) (4,5) (2,8) a function?

snow_lady [41]

Answer:

Step-by-step explanation:

if the X number ever repeats, then its never a function

4 0

3 years ago

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Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company with a large fleet of cars hopes to

3241004551 [841]

Answer:

There is sufficient evidence that fuel economy goal has been attained.

Step-by-step explanation:

The hypothesis :

H0 : μ < 30.2

H1 : μ ≥ 30.2

The test statistic :

(xbar - μ) ÷ (s/√(n))

xbar = 32.12 ; s = 4.83 ; n = 50

Test statistic :

(32.12 - 30.2) ÷ (4.83/√(50))

1.92 ÷ 0.6830651

T = 2.811

Using the Pvalue from test statistic calculator :

Since we used the sample standard deviation, we use the T distribution

df = n - 1 = 50 - 1 = 49

Pvalue(2.811, 49) ; one tailed = 0.00354

At α = 0.05

Pvalue < α ; then we reject the null and conclude that there is sufficient evidence that fuel economy goal has been attained

4 0

3 years ago