1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Viefleur [7K]
3 years ago
14

Evaluate -8y - 4x When x = -6. y = 9

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
6 0
-8(9)= -72; -4(-6)= 24; -72+24= -48
Diano4ka-milaya [45]3 years ago
6 0

Answer:

-48

Step-by-step explanation:

We are given the expression:

-8y-4x

and asked to evaluated when x= -6 and y=9. Therefore, we must substitute -6 in for x and 9 in for y.

-8(9)-4(-6)

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Multiply -8 and 9 ⇔ -8*9= -72

-72-4(-6)

Multiply -4 and -6 ⇔ -4*-6=24

-72+24

Add 24 to -72.

-48

The expression -8y-4x when evaluated at x=-6 and y=9 is equal to -48.

You might be interested in
Given ƒ(x) = x + 10 and g(x) = x2 + 5x - 1, find ƒ(3) + g(5).
SashulF [63]
If I’m not mistaken it should be 8x+25. :)
Hope this helps!
7 0
2 years ago
63 is 90% of what number? using double number lines to get the answer
iren2701 [21]
Since the 90% is 63. divide it by 9. then you would get value of 7. then multiple it by 10.
which is equal to 70. so 100% is 70.
7 0
3 years ago
Read 2 more answers
What's the 8th term geometric sequence below
Gekata [30.6K]
I would choose the answer D 
8 0
3 years ago
Area of a triangle with verticals of (-4,1),(-7,5),(0,1)
Lynna [10]

Answer:

8 ft^2

Step-by-step explanation:

I assume that the three points given are the vertices of the triangle. So the three points are:

A (-4,1)

B (-7,5)

C (0,1)

The area of a triangle is given by:

A=\frac{1}{2}bh

where b is the base and h is the height.

Here we can take as follows:

- We can take the base to be the side AC, so that its length is equal to the distance between the two points:

AC=\sqrt{(0-(-4))^2+(1-1)^2}=4

- The height of the triangle is therefore the perpendicular distance between AC and point B. This is equivalent the difference in the x-coordinate between any point on AC and B, so:

h=(5-1)=4 ft

Therefore, the area of the triangle is:

A=\frac{1}{2}(4)(4)=8 ft^2

7 0
3 years ago
a conical tank with vertex down is 10 feet across the top and 12 feet deep. If water is flowing out of the tank at a rate of 12
TiliK225 [7]

Answer:

The water level is dropping at a rate of 0.24 ft/s

Step-by-step explanation:

Here, we simply want to calculate the change in depth (height of the cone) , given the volume change

Mathematically, we have the volume of a cone as;

V = 1/3 * π * r^2 * h

we are given dv/dt as 12 ft^3/m

dv/dh = 1/3 * π * r^2

Substituting the value for the radius, we have

dv/dh = 1/3 * 22/7 * 4^2 = 50.29

dh/dt = dh/dv * dv/dt

dh/dv = 1/(dv/dh) = 1/50.29

Thus,

dh/dt = 1/50.29 * 12

dh/dt = 0.24 ft/s

3 0
3 years ago
Other questions:
  • A Springer Spaniel weighs 20 kilograms 490grams. A Cocker Spaniel weighs 7,590 grams less than a Springer Spaniel. A Newfoundlan
    12·1 answer
  • Enrique earns 10 points for each question that he answers correctly on a geography test. Write an equation for the number of poi
    5·2 answers
  • She earns $20 per hour as a carpenter and $25 per hour as a blacksmith. Last week Giselle worked both jobs for a total of 30 hou
    12·2 answers
  • 3+1/2(5-x)&lt;-5<br><br>the solution is______​
    11·2 answers
  • Can I please have help with numbers 28 and 30 and can you check if I got number 29 correct? THANK YOU
    5·1 answer
  • The sides of a regular hexagon is 16ft. What is the area of the hexagon?
    8·2 answers
  • Someone help me pleaseee this homework is due in 5 MINUTES
    14·1 answer
  • The price of gallon of gasoline went from $3.50 to $2.87. What is the percent decrease?
    5·2 answers
  • The distance from Hawthorne to Huntington Beach, on a map, is 0.75 inches. The scale on the map says that 2 in = 175 miles. Appr
    14·1 answer
  • Find 34−13.95 . Express your answer in decimal form.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!