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sattari [20]
3 years ago
13

Solve by substitution. 5x-3y=-4 x+y=-4

Mathematics
1 answer:
GrogVix [38]3 years ago
5 0

Answer:

x=-2,y=-2

Step-by-step explanation:

x+y=-4

x=-4-y--(3)

substitute (3) in (1)

5(-4-y) -3y=-4

-20-5y-3y=-4

-8y=16

y=16/-8

y=-2

substitute y in (3)

x=-4-(-2)

x=-2

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A circle with area 81ㅠ has a sector with a central angle of 120°.
Mrac [35]

Answer:

<h2>84.78</h2>

Step-by-step explanation:

We have the area of a circle

A_O=81\pi

The sector with a central angle of

120^o

Calculate, what part of 360° is an angle 120°:

\dfrac{120^o}{360^o}=\dfrac{1}{3}

The same part of an area of a circle is an area of a segment.

Therefore:

A_S=\dfrac{1}{3}\cdot81\pi=27\pi

Use π ≈ 3.14

A_S\approx(27)(3.14)=84.78

4 0
4 years ago
A softball pitcher throws a softball to a catcher behind home plate. The softball is 3 feet above the ground when it leaves the
Xelga [282]

The <em><u>correct answer</u></em> is:

h(t) = –16t² + 50t + 3

Explanation:

The general form of an equation such as this is h(t) = at² + v₀t + h₀, where a is the constant due to gravity, v₀ is the initial velocity and h₀ is the initial height.

We are given that the constant due to gravity is -16.

The initial velocity is 50, and the initial height is 3; this gives us the equation

h(t) = -16t² + 50t + 3

5 0
3 years ago
Read 2 more answers
A car rental costs a fee of $150 plus $35 per
lutik1710 [3]

Answer:

5 hours

Step-by-step explanation:

We know that Joey spent a total of $325. He first paid the fee of $150. Let's subtract $150 from $325.

$325 - $150 = $175

Now, we know that it costs $35 per hour to rent the car. So, we divide $175 by $35 to find out how many hours Joey rented the car for.

$175 ÷ $35 = 5 hours

3 0
3 years ago
316 meters in 28 seconds
noname [10]

Answer:

What is your question? how many meters in 1 second?

Well is that was your question, it would be 11.3 meters rounded.

But if your question was how many meters in 1 minute, the answer would be 678 meters because 11.3 meters in one second times 60 seconds is 678

Step-by-step explanation:

Hope this helps, can you please mark me brainliest? I just need 4 more brainliest to become expert

4 0
3 years ago
A decimal that is equivalent to 188/11
nekit [7.7K]
17.09090909... Just divide 188 by 11
8 0
4 years ago
Read 2 more answers
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