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m_a_m_a [10]
3 years ago
6

Evaluate the expression when x=-1 and y= -8 z=1/4xyz

Mathematics
1 answer:
mr_godi [17]3 years ago
5 0

Substitute the values of x, y and z to the expression:

x=-1,\ y=-8,\ z=\dfrac{1}{4}\\\\xyz=(-1)(-8)\left(\dfrac{1}{4}\right)=(8)\left(\dfrac{1}{4}\right)=\dfrac{8}{4}=2

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Firlakuza [10]

Answer:8x=10y

Step-by-step explanation:

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2 years ago
in thier last game the schook football team scored an equal numbwr of points in each of the first 3 quaters then 14 in the fouth
Zarrin [17]

Answer:

they scored 10 in the first quarter

Step-by-step explanation:

44-14=30

30 divided by 3 = 10

(i got divided by 3 because its 3 quarters and i have to figure out the amount for 1 quarter)

7 0
2 years ago
A politician wants to estimate the proportion of constituents favoring a controversial piece of proposed legislation. suppose th
Volgvan

Answer:

We are given:

Confidence level = 99%. Therefore, the critical value at 0.01 significance level using the standard normal table is given below:

z_{\frac{0.01}{2}}=2.576

Margin of error is given in the question as:

E=0.05

Since the previous proportion is not given, therefore, we need to assume \hat{p} = 0.5

Therefore, the sample size is:

n=\hat{p}(1-\hat{p}) \left( \frac{z_{\frac{0.01}{2}} }{E} \right)

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4 0
3 years ago
Stacey is selling tickets to the school play. The tickets are $8 for adults and $3 for children. She sells twice as many adult t
Leona [35]

48 adult tickets and 24 children tickets were sold.

Step-by-step explanation:

Given,

Cost of one adult ticket = $8

Cost of one child ticket = $3

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Let,

Number of adult tickets sold = x

Number of child ticket sold = y

According to given statement;

8x+3y=456     Eqn 1

x = 2y              Eqn 2

Putting value of x from Eqn 1 in Eqn 2

8(2y)+3y=456\\16y+3y=456\\19y=456

Dividing both sides by 19

\frac{19y}{19}=\frac{456}{19}\\y=24

Putting y=24 in Eqn 2

x=2(24)\\x=48

48 adult tickets and 24 children tickets were sold.

Keywords: linear equation, substitution method

Learn more about linear equations at:

  • brainly.com/question/11253316
  • brainly.com/question/11258952

#LearnwithBrainly

6 0
3 years ago
What does Point P on the number line represent? (Use the hyphen for negative numbers, such as −9)
Wittaler [7]

Answer:

-7

Step-by-step explanation:

SRRY IF I'M WRONG IM ONLY IN 7TH GRADE BUT MY PROFILE SAYS HIGH SCHOOL srry:(

7 0
3 years ago
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