1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vlada-n [284]
4 years ago
9

Helpppppppppppppppppppppp

Mathematics
1 answer:
kirill [66]4 years ago
5 0
X + 7y = 180 - - - - - a
4x + 2y = 180 - - - - - - b

Multiple a by -2 and b by 7

-2x - 14y = - 360
28x +14y = 1260

Add the above equations:
26x = 900

The value of x is:
x = 900/26 = 34.6°

The value of y can be obtained by replacing the value of x in equation a

34.6 +7y = 180
7y = 180 - 35.6
y = 20.6°

Hope that helps you
You might be interested in
In a class test, keith, ethan, and hannah score 6, 4, and 8 respectively. the mean of these scores is 6. therefore, the standard
Ira Lisetskai [31]
<span>To find StDev, we first have to find the mean of the squared differences. The differences between each score and the mean are 0,-2,2, respectively, giving squared values of 0,4,4. To find the variance, we take the sum of the three values and divide it by the number of values in the total set (3). This gives 8/3 or 2.6667. To find the population StDev, then, take the square root of the variance (2.6667), to find 1.633.</span>
5 0
4 years ago
Give an original example of a situation in which the Distributive Property could be used.
mixer [17]
18(3+14) x 6(21+4) is an example I just came up with you distribute the 18 to the 3 and the 4. And distribute the 6 to 21 and 4.
3 0
3 years ago
Here is for 21 points
Andre45 [30]

Answer:

18

Step-by-step explanation:

.........,...........,.......,,

6 0
3 years ago
Read 2 more answers
Solve the proportion <br><br> 5/7=x/70<br><br> A. 10<br><br> B. 35<br><br> C. 98<br><br> D. 50
myrzilka [38]

Answer:

D. 50

Step-by-step explanation:

Multiply the top and bottom number by 10. The bottom number comes out to be 70 and the top number comes out to be 50.

7 0
3 years ago
Read 2 more answers
Henry has a wooden chest that has a length of 312 ft, a width of 114 ft and a height of 2 ft. Henry sands the entire outside of
timurjin [86]
The surface area of a rectangular prism is:

A=2(xy+xz+yz)  where x,y, and z are the dimensions, in this case:

A=2(312*114+312*2+114*2)

A=2(35568+624+228)

A=2(36420)

A=72840 ft^2
4 0
3 years ago
Other questions:
  • 1.Quick market <br> 2.stop and save
    15·1 answer
  • Mr. Foster had a farm with 240 acres; he sold 200 acres. What fraction of the farm did he sell?
    5·1 answer
  • Find the distance between A (-3, -2) and B(-11, – 17).
    15·1 answer
  • Possible answers: <br> X+2<br> X+1<br> X^2+3x+2<br> 0
    5·1 answer
  • What is the surface area in square centimeters of the cube with all sides 9 cm
    6·1 answer
  • In triangle ΔABC, ∠C is a right angle and CD is the altitude to AB . Find the measures of the angles of the ΔCBD and ΔCAD if: Ch
    8·1 answer
  • The legs of a isosceles right triangle both measure 10 inches find the length of the hypotenuse
    8·1 answer
  • Gotta do this for extra credit<br> Help
    12·2 answers
  • Proportions in similar triangles
    15·1 answer
  • Angle EFG and angle HFG have a ratio of 1:3. Find angle EFH
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!