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
gizmo_the_mogwai [7]
3 years ago
11

Which value of x satisfies both - 9x + 4y = 8 and -3x-y= 4 given the same value of y?

Mathematics
1 answer:
lara31 [8.8K]3 years ago
8 0

Answer:

x=-\frac{8}{7}

Step-by-step explanation:

We want to find the value of x that satisfies both

- 9x + 4y = 8

and

-3x-y= 4

given the same value of y.

This is the x-value of the point of intersection of the graph of the two lines.

We make y  the subject of the bottom equation to get:

y=-3x-4

We substitute y=-3x-4 into the top equation to get:

-9x+4(-3x-4)=8

Expand to get:

-9x-12x-16=8

Group like terms

-9x-12x=8+16

-21x=24

x=-\frac{24}{21}=-\frac{8}{7}

You might be interested in
Steven lives 1500 yards from the corner store, and 2700 yards from the park. the park, the store, and steves house are all colli
Alexandra [31]

Answer:

4200

Step-by-step explanation:

Just add both distances together since we know his house is in between both the shop and the park.

8 0
1 year ago
Carter answered 5% of the questions
Ipatiy [6.2K]

Answer:19/20

1-20=19

1÷20=0.05

0.05=5%

I hope this is good enough:

4 0
3 years ago
Find the measure of the indicated angle.
marusya05 [52]

Answer:

the answer is 96°

Step-by-step explanation:

it is an isosceles triangle as it's 2 sides are equal.

for an isosceles triangle, the angles made by the equal sides with the third side are equal.

and the sum of all angles in a triangle = 180°

42 + 42 + x = 180

x = 180 - 84

X = 96°

4 0
3 years ago
What part of the expression 4(x+3) is a factor
makkiz [27]
4,x,3,and (x+3)
i think
5 0
3 years ago
Benjamin is trying to find the height of a radio antenna on the roof of a local building.
xz_007 [3.2K]

The height of the antenna on the roof of the local building is approximately 8 meters.

The situation forms a right angle triangle.

<h3>Properties of a right angle triangle:</h3>
  • One of its angles is equals to 90 degrees
  • The sides of the triangles can be calculated using Pythagoras theorem.

Therefore, let's find the height of the building and the radio antenna from the eye point.

Using trigonometric ratios,

tan 40° = opposite / adjacent

tan 40° = x / 25

where

x = the height of the building and the radio antenna from the eye point.

x = 25 tan 40

x = 25 × 0.83909963117

x = 20.9774907794 meters

Let's find the height of the building from his eye point.

tan 28° = y / 25

where

y = height of the building from his eye point

y = 25 × tan 28°

y = 25 × 0.53170943166

y = 13.2927357915 meters

Height of the antenna = 20.9774907794 - 13.2927357915 = 7.68475498786

Height of the antenna ≈ 8 meters

learn more on elevation here: brainly.com/question/17582385?referrer=searchResults

8 0
2 years ago
Other questions:
  • HELPP ITS IMPORTANT
    8·1 answer
  • Simplify square root 50y^15 (inside the radical) assume y represents a positive real number
    7·1 answer
  • How much greater is 500 then 5
    8·1 answer
  • Can someone please help me with this?
    10·1 answer
  • PLZZ HELPP!! Water is poured from a 1.5 L water bottle into an empty glass until both the glass and the bottle are 3/4 full. Wha
    8·2 answers
  • How do i work this problem out
    8·1 answer
  • PLEASE HELP ME!!!
    15·2 answers
  • Sally paid the following bills rent $450.00 cell phone $37.50 and cable $69.99 how much money did she pay ?
    13·1 answer
  • Is 4393 is divisible by which number
    5·2 answers
  • Which equation is equivalent to -y + 2y - 9 = 1 ? y=8
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!