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timama [110]
3 years ago
12

Evaluate the expression (2x + y) - z when x= 3, y = 4, z =5​

Mathematics
1 answer:
Lapatulllka [165]3 years ago
5 0

Answer:

5

Step-by-step explanation:

(2x + y) - z

Let x=3  y=4 and z=5

2*3 +4 -5

Multiply and divide first

6 +4 -5

Then add and subtract

10-5

5

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4x-10y=-16 and -7x+20y=23 elimination
mixas84 [53]

(-5/8, 27/20) is the answer.

6 0
4 years ago
1. Choose the correct symbol to compare. 8/10<br> 3/4<br> &lt;<br> &gt;<br> =
oksano4ka [1.4K]

Answer:

I think 8/10 is greater?

3 0
3 years ago
Read 2 more answers
A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape....
frosja888 [35]

Answer:

About 41.5%

Step-by-step explanation:

<em>Given:</em>

<em>A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape.</em>

<em>To Find:</em>

<em>What is the probability that both grapes are red?</em>

<em>Answer choices:</em>

<em>about 39.7%</em>

<em>about 41.5%</em>

<em>about 42.5%</em>

<em>about 44.5%</em>

<em>Solution:</em>

<em>Since, there are 8 green grapes and 15 red grapes, the total number of grapes is 23 .</em>

<em>As the red grapes are 15..</em>

<em>Thus,</em>

<em>The probability of choosing a red grape the first time is 15/23.</em>

<em>Because out of the total 23 grapes only 15 were red grape.</em>

<em>The probability of choosing the red grape the second time will be 14/22. Because the number of red grapes has already decreased by one and so is the total number of grapes after first choice</em>

<em>Hence, the probability of choosing or eating two red grapes will be :</em>

<em>15/23×14/22</em>

<em>=105/253</em>

<em>=0.415</em>

<em>= 41.5%</em>

<em>Therefore, the probability that both grapes are red is about 41.5%</em>

5 0
2 years ago
What is the midpoint of the segment shown below?
Snezhnost [94]

The midpoint of the segment shown below is (1, -3/2). Option A) is the correct answer.

<u>Step-by-step explanation</u>:

The two end points of the line segments are (1,2) and (1,-5).

<u>step 1</u> :

Midpoint formula = ((x1 + x2)/2 , (y1 +y 2)/2)

<u>step 2</u> :

(x1, y1) = (1, 2)

(x2, y2) = (1, -5)

<u>step 3</u> :

Substitute the values in the midpoint formula,

Midpoint = ((1 + 1)/2 , (2 -5)/2)

                = ((2/2) , (-3/2))

                = (1, -3/2)

5 0
3 years ago
Sally had seventy - seven dollars to spend on eight books. After buying them she had thirteen dollars. How much did each book co
4vir4ik [10]
8 books because 77 minus 13 is 64. 64 divided by 8 is 8.
6 0
3 years ago
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