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erastova [34]
3 years ago
8

Solve for x. 3x + 4x = 14 X = please explain how you got the answer too

Mathematics
1 answer:
Komok [63]3 years ago
5 0
X=2
You add 3x and 4x which is 7x then divide 14 by 7 which is 2
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Carl is seventy-three inches tall. This is twenty-one inches less than two times Marcia's height. How tall is Marcia?
sleet_krkn [62]

Answer:

Marcia is 47 inches tall.

Step-by-step explanation:

Let's solve this step by step and try to visualize the situation.

• Carl: 73 inches tall

The second part of the question states that Carl's heigh is twenty-one inches less than two times Marcia's height. Add 73 + 21 to equal 94. Since Carl is 21 inches less that means that Maria is 21 inches more ( so that's why I added instead of subtracting) because we are trying to find Maria's equation.

Let x be Marcia's height

2x = 94

• The question staes that 73 is 21 inches less than two times Marcia's height which means that the equation 2x = 94 applies because 73 + 21 = 94

After simplifying the equation, we can get the answer that Marcia is 47 inches tall.

8 0
3 years ago
Read 2 more answers
what is the value of the the expression x+5/y^2 for x = 2/3 and y= 1/3. A. 17/27 B. 17. C.34. D.51
uysha [10]

Answer:

Step-by-step explanation:

x + 5/y^2

x = 2/3

y = 1/3

2/3 + 5 / (1/3)^2            Expand (1/3)^2

2/3 + 5 / (1/9)                Put a 1 underneath the 5

2/3 + 5/1 / (1/9)             Invert and multiply the second expression

2/3 + 5/1 * 9                 Simplify 5/1

2/3 + 5* 9                     Combine

45 2/3

I'm not getting any of these. It's possible I'm misreading the question, but what you've given is the result I got. All I can suggest is that you ask your teacher how this is done.

5 0
2 years ago
Solve the system by using the combination method<br> 4x+9y=7 <br> 4x-9y=9
harkovskaia [24]
The two original functions are 4x+9y=7 and 4x-9y=9
To use the combination method, add all the values of the two equations together to cancel out one of the variables
4x+4x+9y-9y=7+9
8x=16
8x/8=16/8
x=2
4(2)+9y=7
8+9y=7
8-8+9y=7-8
9y=-1
y=-\frac{1}{9}
7 0
3 years ago
Mrs. Smith bought breakfast tacos for her family and they cost $9.48 for a dozen tacos how much was the cost of each taco
Murrr4er [49]

$0.79

Just divide 9.48 by 12.

4 0
3 years ago
A luxury liner leaves a port on a bearing of 110 degrees and travels 8.8 miles. It then turns due west and travels 2.4 miles. Ho
myrzilka [38]

Answer:

Distance= 6.6 miles

Bearing= N 62.854°W

Step-by-step explanation:

Let's determine angle b first

Angle b=20° (alternate angles)

Using cosine rule

Let the distance between the liner and the port be x

X² =8.8²+2.4²-2(8.8)(2.4)cos20

X²= 77.44 + 5.76-(39.69)

X²= 43.51

X= √43.51

X= 6.596

X= 6.6 miles

Let's determine the angles within the triangle using sine rule

2.4/sin b = 6.6/sin20

(2.4*sin20)/6.6= sin b

0.1244 = sin b

7.146= b°

Angle c= 180-20-7.146

Angle c= 152.854°

For the bearing

110+7.146= 117.146

180-117.146= 62.854°

Bearing= N 62.854°W

8 0
3 years ago
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