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ira [324]
3 years ago
15

-7-2x=7(x+8) What is the answer for this expression

Mathematics
1 answer:
sertanlavr [38]3 years ago
7 0

Answer:

x=-7

Step-by-step explanation:

1. Distribute the 7 into the parenthesis: -7-2x=7x+56

2. Combine like terms by doing the opposite operation to the numbers:  -7=9x+56 (added 2x to 7x)

3. Subtract 56 to each side of the equation: -63=9x

4. To isolate the variable "x," divide each side by 9: x=-7

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A rectangular garden has length and width as given by the expressions below.
Helen [10]
2[4 − 7(3x + 4y)] + 2[3x(−2y)]
2[4 - 21x -28y] + 2[-6xy]
8 - 42x - 56y -12xy

the perimeter of given rectangular garden is (8 - 42x - 56y -12xy).
4 0
3 years ago
810 songs; 130% increase
horrorfan [7]
To do 130% increase you multiply by 1.3 so you do 810 × 1.3 = 1053
4 0
3 years ago
Bob is driving along a straight and level road toward a mountain. At some point on his trip, he measures the angle of elevation
DerKrebs [107]

Answer:

Option A.

Step-by-step explanation:

Distance between Bob and the center of the mountain at the base = 19,427.5 ft.

Angle of elevation to the top of the mountain = 25°11'

We know that

1 degree = 60 minutes

1/60 degree = 1 minute

25^{\circ}11'=25^{\circ}+\frac{11}{60}{\circ}\Rightarrow 25^{\circ}+0.183^{\circ}=25.183^{\circ}

Let the height of the mountain be h.

In a right angled triangle

\tan\theta = \frac{opposite}{adjacent}

\tan(25.183^{\circ}) = \frac{h}{19427.5}

\tan(25.183^{\circ})\times 19427.5 = h

h=0.4702\times 19427.5

h=9134.8105

h\approx 9135

Therefore, the height of the mountain to the nearest foot 9135. Option A is correct.

5 0
3 years ago
The expression 15n + 2(3p) represents the amount Isaiah spent buying gasoline and snacks, where n represents the price of each g
Lena [83]

Answer:

p= 2.5

Step-by-step explanation:

maybe you meant 15=2(3p)

so that would be the answer

3 0
3 years ago
Find the missing number so that the equation has infinitely many solutions.<br> –3x _+= –3 (x–1)
Tema [17]

The the missing number so that the equation has infinitely many solutions will be 3.

<h3>How to illustrate the equation?</h3>

It should be noted that an equation shows the relationship that's exists between variables.

In this case, the missing number so that the equation has infinitely many solutions will be:

–3x _+= –3 (x–1)

-3(x - 1)

= -3x + 3

Therefore, the missing number is 3

Learn more about equations on:

brainly.com/question/2973832

#SPJ1

4 0
1 year ago
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