Ive never seen a question like this tbh

Answers

Answer 1

Answer: The formula A=1/2bh is used to find the area of a triangle. You can find from the diagram that the base of this triangle is 9cm, and the height is 4cm. Plug those numbers into the area of a triangle formula.

A=1/2(9)(4)

Multiply to get 18 square cm, which is choice D.

Answer 2

Answer: Easiest question I have ever seen! :)
We know the formula of the area of a triangle
= $(1)/(2)$ ×base×height
The height given is 4 cm (we should take the perpendicular height)
And the base length is 8 cm
Simply, we just substitute the given numbers
= $(1)/(2)$ ×8×4
=18 cm²
The answer is D: 18 square m

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4x+8=7 I got -1/4 but don't know if you drop the negative when dividing
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Hot dogs buns come in packages of 8 for the school picnic mr spencer bought 30 packages of hot dog buns . How many hot dog buns did he buy

Answers

Answer:

240 buns

Step-by-step explanation:

Hot dogs buns come in packages of 8.

Mr Spencer bought 30 packages of hot dog buns for the school picnic.

We have to multiply 30 packages with number of buns in one package.

He bought total number of hot dog buns = 30 × 8

= 240 buns

Mr. Spencer bought 240 hot dog buns.

He bought 240 hot dog bun for the picnic you need to multiply 30x8=240

Solve using the substitution method Y+2x=7
14-4x=2y

A the solution is (1,5)
B the solution is (21,0)
C there an infinite number of solutions
D there is no solution

Answers

Since the value on both sides are the same, hence there are infinite number of solution for the system of equation

System of equations

Given the system of equations expressed as:

Y+2x=7

14-4x=2y

Using the substitution method.

From equation 1, y = 7 - 2x

Substitute into equation 2

14-4x = 2(7 - 2x)

Expand

14 - 4x = 14 - 4x

0x = 0

Since the value on both sides are the same, hence there are infinite number of solution for the system of equation

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14-4x=2y divide 2 to both sides
VVVVV
7-2x=y you will need this on the next step
-----------------------------------------------------
y+2x=7
y=7-2x
(7-2x)+2x=7 -------> 7-2x+2x=7
7=7
The answer is C.

On a scale model of a building, 1 4 inch represents 3 8 foot. What length on the model represents 1 foot? 3 32 in. 2 3 in. 1 1 1 in. 10 2 3 in.

Answers

Answer:

2/3 in

Step-by-step explanation:

We can use ratios to solve this problem.

1/4 inch x inches

-------------- = ---------------------

3 /8 ft 1 ft

Using cross products

1/4 * 1 = 3/8 * x

Multiply each side by 8/3 to isolate x

1/4 * 8/3 = 3/8*8/3 x

2/3 = x

If f(9)=7, then the point ___________ is on the graph of f.

Answers

Answer:

(9,7)

Step-by-step explanation:

F(a)=b means the point (a,b) is on the graph of F

Final answer:

The point that is on the graph of the function f, given f(9)=7, is (9, 7). This results because 9 is the input (x-coordinate) and 7 is the output (y-coordinate) of the function.

Explanation:

In mathematics, particularly in graphing functions, each point on the graph of a function f is represented by an ordered pair: the input (x-coordinate) and the output (y-coordinate). When you are given that f(9)=7, this essentially means that when the input is 9, the output is 7. Therefore, the point that is on the graph of the function f is (9, 7).

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One line passes through the points (-2, 1) and (4,9). Another line passes through points (-3, 8) and (5,2).Are the lines parallel, perpendicular, or neither?
A.Parallel
B.Perpendicular
C.Neither

Answers

The given lines are perpendicular to each other because there slope are negative reciprocals of each other.

What is the point slope form of a line ?

Point slope form is used to represent a straight line using its slope and a point on the line.

The line passes through two points which are (-2,1) and (4,9). The other line passes through points which are (-3,8) and (5,2).

We know that the equation of a linein point slope form is given by :

(y - y1) = m (x - x1)

For the first line : (x , y) = (-2 , 1) and (x1 , y1) = (4 , 9)

So ,

(1 - 9) = m (-2 - 4)

-8 = m × -6

m = 8/6

For the other line : (x , y) = (-3 , 8) and (x1 , y1) = (5 , 2)

So,

(8 - 2) = m (-3 - 5)

6 = m × -8

m = -6 / 8

We know that if two lines are perpendicular then , there slopes are negative reciprocals of each other. i.e.,

8/6 can be written as :

= -1/(8/6) = -6/8

The lines are perpendicular to each other.

Therefore , the first line and second line are perpendicular to each other because there slope are negative reciprocals of each other.

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Answer:

Perpendicular

Step-by-step explanation:

khan academy

a train is traveling from new orleans to memphis at a constant speed of 79 mph. New Orleans and Tennessee are 395.1 miles apart. How long will the train take to reach Tennessee?