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Fittoniya [83]
3 years ago
7

Evaluate each expression below.1. 7-2(x-4) when x=5​

Mathematics
2 answers:
Llana [10]3 years ago
8 0

Answer:

<h2>5</h2>

Step-by-step explanation:

7-2(x-4)\qquad\text{put}\ x=5\ \text{to the given expression}\\\\7-2(5-4)\qquad\text{use PEMDAS - Parentheses first}\\\\=7-2(1)\qquad\text{Next Multiplication}\\\\=7-2\qquad\text{Next Subtraction}\\\\=5

solniwko [45]3 years ago
5 0

Answer:

5

Step-by-step explanation:

7−2×(5−4)

7−2×1

7−2

5

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8 = 1/13v solve this and pretty please show some simple steps
prohojiy [21]
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6 0
3 years ago
Two families go ice skating one day. The first family spends $25 on skate rentals for 5 kids and 2 adults. The second family spe
Phantasy [73]
Explanation:

Let’s take kids as x and adults as y

According to the question,

5x + 2y = 25 (1)
3x + 1y = 14 (2)

Let’s multiply (2) with 2 so take we can solve the equations

5x + 2y = 25
6x + 2y = 28
(-) (-) (-)
___________
-1x = = -3
x = 3

Substituting to get y

3x + 1y = 14
3(3) + y = 14
y = 14-9
y = 5

Answer:

Therefore, each child’s skate rental (x) costs $3 and each adults’s skate rental (y) costs $5


Hope it helped! :)
6 0
4 years ago
Solve the system y=2x-1
Assoli18 [71]
Lets solve our system of equations step by step:
y=2x-1 equation (1)
3x-y=-1 equation (2)

Step 1. Replace equation (1) in equation (2)
3x-y=-1
3x-(2x-1)=-1
3x-2x+1=-1
x=-2 equation (3)

Step 2. Replace equation (3) in equation (1)
y=2x-1 
y=2(-2)-1
y=-4-1
y=-5

We can conclude that the correct answer is: <span>A (−2, −5) </span>
6 0
3 years ago
The present value of R8052.55 received in 5 years at 9% interest is
mel-nik [20]

Answer:

<h2>The present value of a bond is calculated by discounting the bond's future cash payments by the current market interest rate. In other words, the present value of a bond is the total of: The present value of the semiannual interest payments, PLUS. The present value of the principal payment on the date the bond matures.Calculate the present value investment for a future value lump sum return, based on a constant interest rate per period and compounding. This is a special instance of a present value calculation where payments = 0. The present value is the total amount that a future amount of money is worth right now.</h2>

8 0
4 years ago
(a3 - 2a + 5) - (4a3 - 5a2 + a - 2)​
djverab [1.8K]

Answer:

5 * a^3 - 5 * a^2.

Step-by-step explanation:

is it wrong??

7 0
3 years ago
Read 2 more answers
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