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zavuch27 [327]
3 years ago
10

Evaluate each expression if a=-1, b=4,x=-2 and y=3 2(6a-2b)-8x

Mathematics
1 answer:
Andreyy893 years ago
4 0

Answer:

-12

Step-by-step explanation:

2(6a-2b)-8(-2)

=2[6(-1)-2(4)]+16

=2[-6-8]+16

=2[-14]+16

=-28+16

=-12

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What is the scientific notation for 0.000639
daser333 [38]

Answer:

6.39*10^-4

Step-by-step explanation:

according to the form that is used to convert usual into scientific notation it be like 6.39*10^-4

4 0
3 years ago
URGENT, PLEASE HELP! (3/5) -50 POINTS- !please no wrong answers for the points.! A) <img src="https://tex.z-dn.net/?f=y%20%3D%20
shtirl [24]

Answer:

B y = -1/2x + 7/2

Step-by-step explanation:

We know that it has a negative slope since the points go from the top left to the bottom right

We can eliminate A and D

The y intercept is where it crosses the y axis

It should cross somewhere between 2 and 4

C  has a y intercept of 9 which is too big

Lets verify with a point

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y = -4(-4)+9 = 16+9 = 25  (-4,25)  not even close to being near the points on the graph

checking B

y = -1/2 (-4) +7/2

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5 0
3 years ago
Read 2 more answers
Which statements are true about the place values in the number 99.999?
allsm [11]
Answers A. and B. Are correct
5 0
3 years ago
A barber gives 16 haircuts in 5 hours. In minutes, at what rate is the barber giving one haircut? How many haircuts can he give
Alex_Xolod [135]
C.)18.75 minutes;25 haircuts
6 0
3 years ago
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In Yellowstone National Park there are 300 species of birds that migrate. This accounts for 2/7 of all the species of birds sigh
Juli2301 [7.4K]

Answer:

\frac{2}{7} x = 300

Step-by-step explanation:

Let x = the number of all the species of birds sighted in the park

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the above sentence means “(2/7)x = 300”

now we can solve it :

(2/7)x = 300

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⇔ x = 2100/2

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7 0
3 years ago
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