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riadik2000 [5.3K]
3 years ago
13

Maddie buys 3 sodas for $2 each. she pays with cash and receives $4 in change. write an equation that can be used to find d, the

number of dollars she paid with?
Mathematics
1 answer:
Ierofanga [76]3 years ago
3 0
3×2=6+4=d the 3×2 is how much the cost is and 6+4 is 10 so she paid 10 dollars
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1.Bobby walked 5 miles and then 1/2 the distance. What is his total distance?
gtnhenbr [62]

Answer:

7.5 miles

Step-by-step explanation:

Half of 5 equals 2.5. Bobby already walked 5 miles so you add the 2.5 since he walked another half of that distance. 5 + 2.5 = 7.5

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3 years ago
What is the value of x? x+45=11 Enter your answer in the box in simplest form.
Ksivusya [100]

Isolate the x. Note the equal sign. What you do to one side, you do to the other. Subtract 45 from both sides

x + 45 (-45) = 11 (-45)

x = 11 - 45

x = -34

-34 is your answer

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8 0
3 years ago
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Which angle has the same measure of the dihedral angle formed by plane DAJ and plane ABC?
mario62 [17]

angle JAB,

dihedral angle is the angle between two intersecting planes. So, the angle with the same measure of the dihedral angle formed by plane DAJ and plane ABC is angle JAB

8 0
3 years ago
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Solve with cramer's rule x+2y+3z=11, 2x+y+2z=10, 3x+2y+z=9
nalin [4]

Answer:

x = 2 , y = 0 , z = 3

Step-by-step explanation:

Cramer's rule is a rule through which we can find the solution of linear equation.

we have the three linear equations as

x+2y+3z=11

2x+y+2z=10

3x+2y+z=9

AX=B  

A: coefficient matrix

X= unknown vectors(x,y,z)

D = values of the linear equation (11 , 10 , 9)

now we find the determinant of the given linear equation

determinant of the matrix will be

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

                    = 1(-3) - 2(-4) + 3(1)

                    = -3+8+3 = 8

also D\neq 0

so the determinant is Non zero we can apply Cramer's rule

we will be replacing the first column of the coefficient matrix A with the values of D

by replacing the first column we will get the value of the variable 'x'

Dx =  \left[\begin{array}{ccc}11&2&3\\10&1&2\\9&2&1\end{array}\right]   = 11(1-4) -2(10-18) + 3(20-9) = -33+16+33 = 16

x = \frac{Dx}{D}  = \frac{16}{8} = 2

similarly

Dy = \left[\begin{array}{ccc}1&11&3\\2&10&2\\3&9&1\end{array}\right] = 1(10-18) -11(2-6) + 3(18 -30) = -8 +44 -36 = 0

y = \frac{Dy}{D} = 0

Dz= \left[\begin{array}{ccc}1&2&11\\2&1&10\\3&2&9\end{array}\right] = 1(9 - 20) -2(18 - 30) + 11(4 -3) = -11 +24 +11 = 24

z = \frac{Dz}{D} = \frac{24}{8} = 3

so we have the solution as

x = 2 , y = 0 , z = 3

Therefore the solution for the given linear equations is (2,0,3).

3 0
3 years ago
If you can give me 3 BRAINYS I will give you a brainy and 200 points
chubhunter [2.5K]

Answer:

fr thx

Step-by-step explanation:

4 0
3 years ago
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