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Alecsey [184]
3 years ago
12

I need help please, asap!

Mathematics
1 answer:
stich3 [128]3 years ago
7 0

Answer:

x = 11

Step-by-step explanation:

1) A line is equal to 180°. Subtract 70° from the 180°:

180 - 70 =

110

2) To find x set 7x +33 equal to 110:

110 = 7x +33

3) Subtract 33 from both sides:

77 = 7x

4) Divide both sides by 7

x = 11

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Which coefficient matrix represents a system of linear equations that has a unique solution ?
finlep [7]

Answer:

Option C

Step-by-step explanation:

We are given a coefficient matrix along and not the solution matrix

Since solution matrix is not given we cannot check for infinity solutions.

But we can check whether coefficient matrix is 0 or not

If coefficient matrix is zero, the system is inconsistent and hence no solution.

Option A)

|A|=\left[\begin{array}{ccc}4&2&6\\2&1&3\\-2&3&-4\end{array}\right] =0

since II row is a multiple of I row

Hence no solution or infinite

OPtion B

|B|=\left[\begin{array}{ccc}2&0&-2\\-7&1&5\\4&-2&0\end{array}\right] \\=2(10)-2(10)=0

Hence no solution or infinite

Option C

\left[\begin{array}{ccc}6&0&-2\\-2&0&6\\1&-2&0\end{array}\right] \\=2(36-2)=68

Hence there will be a unique solution

Option D

\left[\begin{array}{ccc}5&10&5\\4&1&4\\-1&-2&-1\end{array}\right] \\=2(10)-2(10)=0=0

(since I row is -5 times III row)

Hence there will be no or infinite solution

Option C is the correct answer



4 0
3 years ago
Read 2 more answers
A parabola has its vertex at (2, 1) and crosses the x-axis at (1,0) anu al l
Y_Kistochka [10]

Answer:

A

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (2, 1), thus

y = a(x - 2)² + 1

To find a substitute (1, 0) into the equation

0 = a(1 - 2)² + 1

0 = a + 1 ( subtract 1 from both sides )

a = - 1

Hence

y = - (x - 2)² + 1 or

y = 1 - (x - 2)² → A

7 0
3 years ago
A tree trunk is pulled with a force of 3200 pounds by a truck’s cable that makes an angle of 25° with the horizontal. What is th
mr_godi [17]

Answer:

The vertical component of the force correct to the nearest pound Is

1352 pound

Step-by-step explanation:

Kindly find attached for your reference

This problem bothers on the topic of work energy and power

Given data

Applied force = 3200 pounds

Angle of application = 25°

We know that the horizontal force =

F= 3200cos 25°

Hence the vertical component of this force = F= 3200sin 25

=3200*0.42261

= 1352.352

to the nearest pound

F = 1352pound

3 0
3 years ago
a right triangle has a hypotensue of length 10 ft and one leg o length 7 ft. how long is the other leg? round the answer to the
ivolga24 [154]

Answer:

7.1

Step-by-step explanation:

By using Pythagorean theorem, a^2+b^2=c^2, we can find the missing length of the leg. a^2+7^2=10^2. 7 is the leg length given and 10 is the hypotenuse. Then we solve from there.

a^2+49=100

a^2=51

(sqrt)a^2=(sqrt)51

a=7.14142.....

rounded to the nearest tenth is 7.1

4 0
3 years ago
Read 2 more answers
What is the slope of the equation y = 3/4x – 8
Alisiya [41]

Answer:

The slope of the equation is 3/4

5 0
3 years ago
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