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barxatty [35]
2 years ago
7

Maria has 7 more than 3 times how much money josh has in his savings. If josh has $505 , how much does maria have?

Mathematics
1 answer:
Rudiy272 years ago
3 0

Answer:

$1522

Step-by-step explanation:

M = 7 + 3*J

M = 7 + 3*505

M = 7 + 1515

M = 1522

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What is the solution to the system? 1. x-y + 2 z = -7<br> 2. y + z =1<br> 3. x-2 y - 3 z = 0
kvv77 [185]

You'd find this problem easier to understand and do if you'd please list the defining equations vertically and line up variables:

1. x - 1y + 2 z = -7

2. y + 1z = 1

3. x - 2 y - 3 z = 0 Now eliminate the line numbers:

x - 1y + 2 z = -7

1y + 1 z = 1

x - 2 y - 3 z = 0

Let's use the elimination method to eliminate variable z: Seeing that z = 1 - y, we transform the first equation into 1x - 1y + 2(1-y) = -7

and the third into x - 2y - 3(1-y) = 0.

Simplifying 1x - 1y + 2(1-y) = -7

and x - 2y - 3(1-y) = 0,

we get

1x - 2y - 3 + 3y) = 0 and 1x - 1y + 2 - 2y = -7

which in turn simplify to

1x + y = 3 and 1x - 3y = -9

Having eliminated the variable z, we now focus on eliminating x. Mult. the 1st equation by -1, obtaining -1x - 1y = -3. Add this result to 1x - 3y = -9:

0 - 4y = -12, which tells us that y = 3. Subbing 3 for y in 1x + 1y = 3 tells us that x = 0.

All we have left to determine is the vaue of z.

Borrowing Equation 3, from above, we get x - 2 y - 3 z = 0, and into this equation we substitute x = 0 and y = 3: 0 -2(3) - 3z = 0.

Thus, -3z = 6, and z = -2.

The solution set is (0, 3, -2). You should check this by substitution.

3 0
3 years ago
-3b + 7 = -15 + 2b <br>how to solve this question?<br>​
dsp73

Answer:

Step-by-step explanation:

-3b - 2b + 7 = -15

-5b  = -22

b = 22/5

5 0
3 years ago
I really need help with this, ASAP! Thank you!
mylen [45]
Example 1:
____÷418 = 218
To find the answer to a question like this it's simple. All you do is multiple the two numbers, 418x218, and your answer is: 91,124
Check your work!
91,124÷418= 218 correct!
7 0
3 years ago
Paula got $10.50 from her grandparents on her birthday. She earned $4.45 by babysitting. How much money is this in all? c HAPPY
Aloiza [94]

We have the following:

To calculate the total money, you have to add the amounts that Paula won, as follows

\begin{gathered} T=10.5+4.45 \\ T=14.95 \end{gathered}

Which means that in total they are $ 14.95

8 0
11 months ago
What algebraic propertiy am i using for 5(d + 1)
bekas [8.4K]

Answer:

distributive

Step-by-step explanation:

you are distributing 5(d+1) into 5d +5

4 0
2 years ago
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