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jeka57 [31]
4 years ago
11

Julias text messaging plan costs $8 for the first 400 messages and 20e for each additional text message. If she owes $24.00 for

text messaging in the month of
September, how many text messages did she send that month?
Mathematics
1 answer:
Makovka662 [10]4 years ago
4 0

Answer:

160 is the answer because 8x20 is 160 also 20÷400 is 20 so that made pretty good sense

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Rearrange f=3g+2 to make g the subject
Helen [10]
Minus 2 from bothsides
f-2=3g
divide both sides by 3
(f-2)/3=g
g=(f-2)/3
6 0
4 years ago
Read 2 more answers
Consider kite FGHJ. Kite F G H J is shown. Angle F and H are congruent. The length of side F G is 30 centimeters, the length of
TiliK225 [7]

Answer:

  a = 17, b = 6

Step-by-step explanation:

Sides GF and GH are congruent, so we have ...

  GF = GH

  30 = 2a -4 . . . . substitute given values

  15 = a -2 . . . . . divide by 2

  17 = a . . . . . . . . add 2

Sides FJ and HJ are congruent, so we have ...

  FJ = HJ

  3b +6 = 24 . . . . substitute given values

  b +2 = 8 . . . . . . divide by 3

  b = 6 . . . . . . . . . subtract 2

The values of a and b are (a, b) = (17, 6).

3 0
3 years ago
Given A-<br> 2 2<br> 1 3<br> what is A-¹?
devlian [24]

The inverse of matrix A = \left[\begin{array}{cc}2&2&1&3\\\end{array}\right] is A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|      

The given matrix is A = \left[\begin{array}{cc}2&2&1&3\\\end{array}\right]

The inverse of a matrix is given by

A^{-1} = \frac{1}{|A|} adjA                   ...(1)

Now, determinant of matrix A is

|A| = \left|\begin{array}{cc}2&2&1&3\\\end{array}\right|

= (3)(2) - (2)(1)

= 6 - 2

= 4

Now, adjoint A will be

A_{11} = 3

A_{12} = -1

A_{21} = -2

A_{22} = 2

AdjA = \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|

Now, substituting the values of |A| and AdjA in equation (1), we get

A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|        

Therefore, A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|      

Know more about Inverse of Matrix: -brainly.com/question/12442362

#SPJ9

     

7 0
2 years ago
4:■ =8 :14 fhjyghjhgj
andreev551 [17]

Answer:

■ = 7

Explanation:

Because there two ratios are proportional as a result of being equal.

To find the missing part of the ratio, cross multiply, and solve for ■ by converting them into their equivilent fractions.

i.e a : b = a/b.

So 4 : ■ becomes 4/■. And 8 : 14 becomes 8/14.

i.e a/b = c/d → b × c = a × d → bc = ad

Now 4/■ = 8/14 → ■ × 8 = 14 × 4 → 8■ = 56.

8■/8 = 56/8

1■ = 7

■ = 7

This method works for a missing part pretty much anywhere.

____________________

This is a little faster for ratios:

To find the value of the unknown part of the ratio,

just find the factor between two corresponding numbers, and apply that to the known number corresponding to the unknown part.

4 : ■ = 8 : 14

Notice that 4 corresponds to 8

So the factor between these is 2.

Since from 8 to 4 is a multiple of 1/2. 8 × 1/2 = 4, and 14 × 1/2 = ■.

Therefore ■ = 14 × 1/2 = 14/2 = 7

4 0
3 years ago
Find the probability of rolling the difference of 1
Naddik [55]

Answer:

It’s  1


Step-by-step explanation:


7 0
4 years ago
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