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devlian [24]
3 years ago
8

Nancy and Kevin collect coins. Nancy has x coins. Kevin has nine coins fewer than three times the number of coins Nancy has. Wri

te and simplify an expression for the total number of coins Nancy and Kevin have.
Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0

Answer:

its a and then c.

Step-by-step explanation:

Korolek [52]3 years ago
5 0
Expression: 3x-9 + x
simplified: 4x+9
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in a certain town there are 30000 registered voters, of whom 12000 are Democrats. A survey organization is about to take a simpl
mario62 [17]

Answer:

400.

Step-by-step explanation:

The following data were obtained from the question:

Total number of Registered voters = 30000

Total number of Democrats = 12000

Next, we shall determine the percentage of Democrats in the registered voters.

This can be obtained as follow:

Percentage of Democrats = number of Democrats / Total number of registered voters x 100

Percentage of Democrats = 12000/30000 x 100

Percentage of Democrats = 40%

Now, we can obtain the expected value of percentage of Democrats in the 1000 sample as follow:

Percentage of Democrats = 40%

Total number of Sample = 1000

Number of Democrats in the sampl=..?

Percentage of Democrats = number of Democrats in sample / Total number of sample x 100

40% = number of Democrats in sample/1000

Cross multiply

Number of Democrats in sample

= 40% x 1000

= 40/100 x 1000

= 400

Therefore, the expected number of Democrats in the sample is 400.

4 0
3 years ago
The tabel shows the amount of miles of Cheryl travels 4 each day.About how many miles did she travel during the 4 days?
OLga [1]
4 times 4=16 So in four days, Cheyrl traveled 16 miles.
8 0
3 years ago
A skate ramp is 4.2 meters long. It rises up 1.7 meters. What’s is the angle of elevation to the nearest tenth of a degree?
Kipish [7]
Θ
=
arcsin
(
.7
4.2
)
≈
10
∘
Explanation:
We view the ramp as a right triangle. The hypotenuse is 4.2 and the vertical side .7, which is opposite the angle
θ
we seek.
sin
θ
=
.7
4.2
=
1
6
I'm going to finish the problem but I'll note if we were actually building the ramp we don't need to know the angle; this sine is sufficient.
θ
=
arcsin
(
1
6
)
θ
≈
10
∘
which I think is a pretty steep ramp for a wheelchair.
There will be another inverse sine that is the supplementary angle, around
170
∘
, but we can rule that out as a value for a ramp wedge angle.
4 0
3 years ago
Approximate the real zeros of f(x)= 2x^3 - 4x^2 - 3 to the nearest tenth.
Scrat [10]

Answer:

b.2.3

Step-by-step explanation:

f(x)= 2x^3 - 4x^2 - 3

see graph below

only x intercept is 2.287

6 0
3 years ago
P is the midpoint of XY x p equals 8 x - 2 + p y equals 12x - 30 find the value of x​
disa [49]

Answer:

but please give me and please mark me as

7 0
3 years ago
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