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AleksandrR [38]
4 years ago
7

10 POINTS SOMEONE PLEASEE HELP

Mathematics
1 answer:
d1i1m1o1n [39]4 years ago
5 0

Answer:

x = 18.5

∠1 = 76°

∠2 = 104°

∠3 = 76°

∠4 = 104°

∠5 = 76°

∠6 = 104°

Step-by-step explanation:

4x + 2 + 6x - 7 = 180

4x + 6x = 180 - 2 + 7

10x = 185

x = 185/10

x = 18.5

∠1 = 76°

∠2 = 104°

∠3 = 76°

∠4 = 104°

∠5 = 76°

∠6 = 104°

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( simultaneous equations)
daser333 [38]

Answer:

See method below.

Step-by-step explanation:

m/n + n/3 = 2

2/m + n = 4    

First  eliminate the fractions by multiplying the first equation by 3n:-

3m + n^2 = 6n...........(1)

and the second equation by m:-

2 + mn = 4m..............(2)

Now we solve using substitution:-

From equation  (2):-

4m - mn = 2

m = 2 / (4 - n)

Now substitute for m in equation (1):-

6/ (4 - n) + n^2 = 6n

6 + n^2(4 - n) = 6n(4 - n)

6 + 4n^2 - n^3 = 24n - 6n^2

n^3 - 10n^2 + 24n - 6 = 0

This will not factor so we could solve this using graphical software.

To find the values of the variable m we substitute the found values of n into one of the original equations and solve for m.






6 0
4 years ago
7th grade math pls help
Leona [35]

Answer:

150.72

Step-by-step explanation:

2πr = circumference

2π(24) = 48π = approx. 150.72

π = 3.14

3 0
3 years ago
Read 2 more answers
I just need those two at the top ...<br><br> The other one you ca try. <br><br> NEED TODAY TIGHT NOW
uysha [10]
14: increase
15: decrease

Hope this helps!
6 0
3 years ago
Solve the system of equations x+y=4 and 3x+7y=32 by combining the equations
Nesterboy [21]

Answer:

x = -1

y = 5

Step-by-step explanation:

x+y=4

3x+7y=32

<em><u>To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.</u></em>

x+y=4,3x+7y=32

<em><u>Choose one of the equations and solve it for x by isolating x on the left hand side of the equal sign.</u></em>

x+y=4

<em><u>Subtract y from both sides of the equation</u></em>.

x=−y+4

<em><u>Substitute −y+4 for x in the other equation, 3x+7y=32.</u></em>

3(−y+4)+7y=32

<em><u>Multiply 3 times −y+4.</u></em>

−3y+12+7y=32

<em><u>Add −3y to 7y.</u></em>

4y+12=32

<em><u>Subtract 12 from both sides of the equation</u></em>.

4y=20

<em><u>Divide both sides by 4</u></em>.

y=5

<em><u>Substitute 5 for y in x=−y+4. Because the resulting equation contains only one variable, you can solve for x directly.</u></em>

x=−5+4

<em><u>Add 4 to −5.</u></em>

x=−1

7 0
3 years ago
Please Help I have tried and can not get the correct answer
Nikolay [14]

Answer:

(-3, 0) and (1, 0)

(0, 4)

Step-by-step explanation:

x-intercept is the point where y = 0.

y-intercept is the point where x = 0.

or points ...

f(x) = y = -4×|x + 1| + 8

let's start with the y-intercept (x = 0)

y = -4×1 + 8 = -4 + 8 = 4

the y-intercept point (only 1 point) is (0, 4).

for x = 0 the absolute value function contains 0+1. and that is always +1.

the x-intercept(s) :

0 = -4×|x + 1| + 8 (dividing by -4)

0 = |x + 1| - 2

|x + 1| = 2

because of the absolute value we have 2 possibilities :

+(x + 1) = 2

x + 1 = 2

x = 1

and

-(x + 1) = 2

-x - 1 = 2

-x = 3

x = -3

so the points of x-intercept are (-3, 0) and (1, 0)

3 0
3 years ago
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