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3 years ago

Simplify the expression. (7x4)? (7x4)2 =

Mathematics

2 answers:

TEA [102]3 years ago

5 0

Answer:

Step-by-step explanation:

i took the test

NemiM [27]3 years ago

4 0

56 ??? i’m pretty sure that’s the answer

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If your bill at a restaurant is 36.77 and you want to leave a 20% tip how much $ should you leave for your tip? Round your answe

Oksana_A [137]

Answer: 7.40

It's too short. Write at least 20 characters to explain it well.

6 0

2 years ago

Read 2 more answers

A surveyor sights the far bank of a river at an angle of 110° to the near bank. She then moves 75 feet upriver and sights the sa

Leya [2.2K]

Answer:

Correct answer is 54.82 ft.

Step-by-step explanation:

First of all, let us label the diagram and do the construction as per the attached answer image.

Let us consider $\triangle ABC$ :

$\angle B = 90^\circ\\\angle ACB = 180-110 = 70^\circ$

Let side AB = d ft and let side BC = x ft

We need to find AB to find the shortest distance across the river.

Using trigonometric identity of tangent:

$tan\theta = \dfrac{Perpendicular}{Base}$

$tan 70 = \dfrac{d}{x}\\\Rightarrow x = \dfrac{d}{tan70} = 0.36d ..... (1)$

Now, let us have a look at another right angled triangle ABD:

Let us consider $\triangle ABC$ :

$\angle B = 90^\circ\\\angle ADB = 180-150 = 30^\circ$

side AB = d ft and side BD = x+75 ft

Using trigonometric identity of tangent:

$tan\theta = \dfrac{Perpendicular}{Base}$

$tan 30 = \dfrac{d}{x+75}\\\text{Using equation (1)}:\\0.577 = \dfrac{d}{0.36d+75}\\\Rightarrow 0.207d + 43.27 = d\\\Rightarrow 0.793d = 43.27\\\Rightarrow d \approx 54.82\ ft$

Correct answer is 54.82 ft.

7 0

3 years ago

-b+ 3x = C + 5b Solve for x in terms of b and c I NEED HELP

kakasveta [241]

Answer:

x = (c + 6b)/3

General Formulas and Concepts:

Pre-Algebra

Equality Properties

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define

-b + 3x = c + 5b

Step 2: Solve for x

Add b to both sides: 3x = c + 6b
Divide 3 on both sides: x = (c + 6b)/3

8 0

3 years ago

State the domain of the relation.

gogolik [260]

Answer:

The Domain of the relationship is the set: {-3, -2, -1, 0, 1, 2} (Answer B)

Step-by-step explanation:

Let's recall that the Domain of a relationship is the set of values in the starting set for which there is a correspondent value in the final set.

In this case, we have a set of numbers on the x axis, which are connected with values in the y axis as indicated by the plotting of the points on the (x,y) plane.

The Domain will consist of all those x-values for which we see in the given plot connected to a corresponding y-value.

So, we see that:

the x-value -3 is connected to the y-value -4

the x-value -2 is connected to the y-value -3

the x-value -1 is connected to the y-value -1

the x-value 0 is connected to the y-value 0

the x-value 1 is connected to the y-value 3

and the x-value 2 is connected to two y-values: 4 and 5

Therefore all those x-values are part of the Domain of this relationship. That is, the set: {-3, -2, -1, 0, 1, 2}

7 0

3 years ago

What is the slope of the line that passes through the points (-2, 7) and (2, -5)?

amm1812

Answer:-3

Step-by-step explanation:

6 0

3 years ago