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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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17) Convert the number to scientific notation 0.00317
Masteriza [31]

Answer:

3.17x10^-3

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

6 0
3 years ago
5. A rectangular pyramid measures three feet by four feet at the base, and has a height of seven feet. Find its volume.
den301095 [7]

Answer: 28 ft

Step-by-step explanation:

Multiply 3,4, and 7 to get 84 ft cubed. To find the volume of a pyramid, divide by 3 to get 28 ft.

4 0
3 years ago
7. If the area of a square is 64 square centimeters, what's the
Anvisha [2.4K]

Answer:

If you're asking what the perimeter is:

C 32cm

If you're asking what the length of a side is:

A 8cm

Step-by-step explanation:

Area of a square is calculated by length x width.

And all four sides of a square are equal in length.

Area: 8cm×8cm=64cm2

Perimeter: 8cm + 8cm + 8cm + 8cm= 32cm

Another way to find the length of the sides would be to take the square root of 64. I believe that only works with the area of a square though.

√(64)=8

5 0
3 years ago
Please help me answer this question
Goshia [24]
If the exponent is a negative number, then you make it a fraction, with the exponent on top as a positive and the coefficient as a positive on the bottom AFTER you multiply, so what happens is if the coefficient has a negative exponent, you multiply the number by the exponent, make it positive, and put it under 1 as a fraction. So your answers are:
1/7
1/125
1/36

Hope this helps! Stay safe out there :)
5 0
3 years ago
Read 2 more answers
Use substitution to solve the<br> following system of equations.<br> 8x + 3y = -22 AND y= -6x - 14
irinina [24]
This is the correct answer for the system of equations

5 0
3 years ago
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