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alex41 [277]
3 years ago
7

Which of the given expressions results in 0 when evaluated at x = 5? A. 5x(x − 7) B. (x − 8)(x − 5) C. (x + 7)(x − 2) D. (x + 5)

(x − 8)
Mathematics
2 answers:
Luda [366]3 years ago
6 0
The answer is B. My reasoning is because x is equal to 5 and the expression in the first set of parenthesis equals (-3) and the expression in the second set of parenthesis equals (0). Now when you get those expressions simplified, you multiply them together. Making it equal to 0. I hope this helps you understand. Use PEMDAS if you can recall what that is from school.
SSSSS [86.1K]3 years ago
3 0

Answer:

B. (x - 8)(x - 5)

Step-by-step explanation:

If you plugged in x = 5 into the 2nd equation, you would see that you would be multiplying by 0, which would turn everything zero.

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XxY=100<br> What is X and Y
Dvinal [7]

Answer:

X could be 50 and Y could be 2 or vice versa. X and Y can also be 10.

Step-by-step explanation:

7 0
3 years ago
What is the value of z?<br><br> Enter your answer in the box.
Georgia [21]

Answer:

23

Step-by-step explanation:

Because the angles of a triangle always add up to 180°, you can set up an equation like this.

62+95+z=180

157+z=180

157-157+z=180-157

z=23

4 0
2 years ago
Read 2 more answers
Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. 5x+7=2y and
Luda [366]

Answer:

The correct option is option B. It has one solution, and it's x=-3

Step-by-step explanation:

We have the following system of equations:

5x+7 = 2y                        (1)

y-9x=23                            (2)

Step 1: Solve for 'y' in equation (2):

y-9x = 23

y = 9x + 23

Step 2: Substitute in equation (1):

5x + 7 = 2y

5x + 7 = 2(9x + 23)

5x + 7 = 18x + 46

Step 3: Solve for x:

7 - 46 = 18x - 5x

-39 = 13x

x= -3

So the correct option is option B. It has one solution, and it's x=-3

7 0
3 years ago
Read 2 more answers
9(m-3)+3m=7m+43 help me please
nikdorinn [45]

Answer:

multiply 9 from m and -3

9m - 27 + 3m = 7m + 43

12m - 27 = 7m + 43

12m - 7m = 43+ 27

5m = 70 cut 70 by 5 in 14 times [ 14 x 5= 70 ]

m = 14 answer ❤️❤️ it is 100% correct now!

6 0
2 years ago
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Karen is making a set of costumes for the school play using a piece of cloth. She reduces the length of the cloth she intends to
Anuta_ua [19.1K]

Answer:

The new length is 13.5 meters

Step-by-step explanation:

Here, we are interested in calculating the new length of the cloth she wants to use

What we know from the question is that she is making a reduction of 10% from an initial of 15 meters

Thus, the length she is to use can be calculated by first getting what 10% of 15 meters is

Mathematically, that would be ;

10/100 * 15 = 1.5 meters

We now subtract this from the total of 15 meters

= 15 meters - 1.5 meters = 13.5 meters

6 0
3 years ago
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