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
trasher [3.6K]
3 years ago
9

Find the value of x. (3x-4) (7x+4)

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Answer:

x=18

Step-by-step explanation:

The 2 angles are on a straight line, and are therefore supplementary. This means that they add to 180 degrees.

So,

3x-4+7x+4=180

First, combine like terms

(3x+7x)+(-4+4)=180

10x+0=180

10x=180

Now, we need to solve for x. To do this, we must get x by itself. Since x and 10 are being multiplied, divide both sides by 10. We divide because division is the opposite of multiplication.

10x/10=180/10

The 10s on the left cancel, so we are left with:

x=180/10

x=18

FrozenT [24]3 years ago
6 0

Answer:

3x -  4 + 7x + 4 = 180 \\ 3x + 7x = 180 \\ 10x = 180 \\  \frac{10x}{10}  =  \frac{180}{10}  \\ x = 18 \:  \: degrees

You might be interested in
Can someone help with these? ik the answers i just don’t know how to show work
Nonamiya [84]

Step-by-step explanation:

use trigonometry ratios

8 0
3 years ago
Image of problem attached
AlexFokin [52]

Answer:

g(x)=f(x+1)

h(x)=f(x)+3

6 0
2 years ago
Ax-by/c =d solve for x
wolverine [178]
Answer: x = (cd + by) / a

Working out:

(ax - by) / c = d

1)Multiply by c on both sides to get:
ax - by = cd

2) Add by on both sides to get:
ax = cd + by

3) divide by a on both sides to get:
x = (cd + by) / a
4 0
3 years ago
The legs of a 45 45 90 triangle have a length of 8 units what is the length of the hypotenous
Crank

Answer:

11.31 units

Step-by-step explanation:

a^2 + b^2 = c^2

8^2 + 8^2 = c^2

64 + 64 = c^2

128 = c^2

Opposite of exponents is square roots, and we need to get rid of that exponent in c^2, meaning we find the square root.

\sqrt{128\\} \\\\ = c

c = 11.31 units

3 0
3 years ago
Sneha is planning a 5-night vacation. It will cost $50 for transportation, $290 for food, and $95 per night for a hotel room. Sh
Goshia [24]

Answer:

Step-by-step explanation:

Total cost for trip = 290 + 50 + 95*5 =290+50+ 475 = $ 815

Savings = $143

Money needed = 815 - 143 = $ 672

No. of driveways = 672/48 = 14

14 driveways must she shovel to have enough money to pay for the trip.

6 0
3 years ago
Other questions:
  • Identify the transformation​
    11·1 answer
  • How do I complete the square?
    14·1 answer
  • Help asappppp? i’m having trouble on wat the 1/4 point is
    15·1 answer
  • Write in simplest radical form: √208 Show all work.
    12·1 answer
  • Write an algebraic expression for each situation five less than y
    10·1 answer
  • Completely factored form of n^2-25
    15·2 answers
  • 1. A quadratic equation can have all of the following number of solutions except
    12·1 answer
  • Select the correct answer.
    8·1 answer
  • ASAP ILL GOVE 10 POINTS
    15·2 answers
  • This spinner has 6 equal sections. In simplest form, what are the odds in favor of spinning blue or green?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!