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2 years ago

Which of the following values of z will result in a true statement when substituted into the given equation?

Mathematics

2 answers:

Kazeer [188]2 years ago

8 0

Z=1 because if we plug it in we get 1/5(3+2(1))-4(1)=-3 and then that goes to 1/5(5)-4 = -3 then 1-4=-3 and that is true

DIA [1.3K]2 years ago

5 0

Answer:

A) z=1

Step-by-step explanation:

1/5(3+2z)-4z=-3

3/5+2/5z-4z=-3

2/5z-20/5z=-3-3/5

-18/5z=-15/5-3/5

-18/5z=-18/5

z=(-18/5)/(-18/5)

z=1

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2+ – 2c+ – 9c^2 what is the answer

AlexFokin [52]

Replace all occurrences of + − with a single − . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because 1 ⋅ − 1 = − 1 2 − 2 c − 9 c 2

3 0

3 years ago

3 more than a number t is greater than or equal to 21

natulia [17]

The equation is saying $t+3\geq 21$ . We can use algebra to subtract 3 from both sides to create $t\geq 18$ .

Therefore, the value t is greater or equal to 18.

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3 years ago

Given: ∠A and ∠B are complementary angles.

Eddi Din [679]

Answer:

- For the statement $-3x=24$ , the reason is: Subtraction property of Equality

- For the statement $x=-8$ , the reason is: Division property of Equality.

- For the statement $m\angle B=-6(-8)-39$ , the reason is: Substitution property of Equality.

Step-by-step explanation:

The missing pictures are attached.

We must remember that:

- The Subtraction property of Equality states that:

$If\ a=b,\ then\ a+c=b+c$

- The Division property of Equality states that:

$If\ a=b,\ then\ \frac{a}{c}=\frac{b}{c}$

- The Substitution property of Equality states that:

$If\ a=b,\ then\ b\ can\ replace\ a$

Knowing this properties we can identify the missing reasons that correctly complete the proof.

- For the statement $-3x=24$ , the reason is:

Subtraction property of Equality

(Because it is obtained by subtracting 66 from both sides of $-3x+66=90$ )

- For the statement $x=-8$ , the reason is:

Division property of Equality

(Because it is obtained by dividing both sides of $-3x=24$ by -3)

- For the statement $m\angle B=-6(-8)-39$ , the reason is:

Substitution property of Equality

(Because it is obtained by substituting the value of "x" into $m\angle B=-6x-39$ )

7 0

3 years ago

Classify the following triangle. Check all that apply. 11.4, 9, 7, A. Acute B. Isosceles C. Right D. Equilateral E. Obtuse F. Sc

Ainat [17]

There isn’t an image of the triangle so I’m not able to classify it.

5 0

3 years ago

Read 2 more answers

The algebraic expression 2x -4 when x=8 is evaluated as

jok3333 [9.3K]

Answer:

Step-by-step explanation:

2x-4

Subsitute x for 8 2(8)-4

Simply 16-4

3 0

3 years ago