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2 years ago

what would the phrase "three times the sum of a number and 4" look like as a variable expression? 3(3x 4) 3x 4 3x−4 3(x 4)

Mathematics

2 answers:

rosijanka [135]2 years ago

6 0

It would be
(X + 3) times 3

Gelneren [198K]2 years ago

4 0

Answer:

3 * (x+4)

Step-by-step explanation:

It says three times the sum of a number and 4.

We can express the number we don't know with an x. So the phrase is saying that we have the sum of a number and 4 which is the same as writing:

x+4

Also, it says three times this sum; so we know that the sum is being multiplied by 3:

3 * (x+4)

If we read this it will be the same as the phrase "three times the sum of a number and 4)

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The following graph represents the distance a commercial airplane travels over time, at cruising speed and an altitude of 35,000

ANEK [815]

Answer:

see the explanation

Step-by-step explanation:

The picture of the question in the attached figure

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Let

x ----> the time in hours

y ----> the distance in miles

Find the value of k

For the point (4,2268)

$k=\frac{2,268}{4}=567\ mph$

The slope represent the speed of the airplane

The linear equation is

$y=567x$

Part 1 :

The point (0,0) represents the starting point of the aircraft, when the time and distance are equal to zero. The cruising starts when time t = 0.

Part 2 :

The point (4, 2268) represents the plane after 4 hours of cruise , and shows it has traveled a distance of 2268 miles after 4 hours

3 0

3 years ago

Find the measures of the legs of isosceles triangle ABC if AB= 2x+4,BC= 3x-1,AC=x+1 and the perimeter of the triangle ABC is 34

Naddika [18.5K]

(2x+4) +(3x-1) +(x+1)=34
6x+4=34
x=5
AB=14, BC=14, AC=6

5 0

3 years ago

Read 2 more answers

For f(x)=2x+1 and g(x)=x^2-7 find (f•g)(x)

skad [1K]

(f•g)(x) = (2x+1) (x^2-7)
(f•g)(x) = 2x^3 + x^2- 14x - 7

............................................

8 0

3 years ago

Please...Solve the inequality, and then graph its solution: 5 + 2x - 2 < 12 + 8x - 3x

andreev551 [17]

Rewrite so

is on the left side of the inequality.

−

≥

−

Subtract

from

≥

−

Subtract

from

≥

Move all terms containing

to the left side of the inequality.

Tap for more steps...

≥

Move all terms not containing

to the right side of the inequality.

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≥

−

Divide each term by

and simplify.

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≥

−

The result can be shown in multiple forms.

Inequality Form:

≥

−

Interval Notation:

[

−

∞

)

3 0

2 years ago

1. 6(4x+1)=78 2. 2(x+10)=60 Solve for x

postnew [5]

Answer:

1. x= -3

2. x= 20

Step-by-step explanation:

sorry if this is wrong,

7 0

2 years ago