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andrey2020 [161]
3 years ago
14

Please help me preety please

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
7 0

Answer:

1.5

Step-by-step explanation:

You take 3% of 50.

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Solve 4x-4y=-16; x-2y=-12 by using substitution
Diano4ka-milaya [45]
\left\{\begin{array}{ccc}4x-4y=-16\\x-2y=-12\end{array}\right\\\\\left\{\begin{array}{ccc}4x-4y=-16\\x=2y-12\end{array}\right\\\\substitution:\\\\4(2y-12)-4y=-16\\8y-48-4y=-16\\4y=-16+48\\4y=32\ \ \ \ /:4\\y=8\\\\x=2\cdot8-12=16-12=4\\\\Solution:x=4\ and\ y=8
6 0
3 years ago
PLEASE HELP!!!!!!!<br>please
Nataly_w [17]

Answer:

see explanation

Step-by-step explanation:

To find the zeros let h(t) = 0, that is

t² + 4t + 3 = 0 ← in standard form

(t + 3)(t + 1) = 0 ← in factored form

Equate each factor to zero and solve for t

t + 3 = 0 ⇒ t = - 3 ← smaller t

t + 1 = 0 ⇒ t = - 1 ← larger t

(2)

given a parabola in standard form : ax² + bx + c ( a ≠ 0)

Then the x- coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

h(t) = t² + 4t + 3 ← is in standard form

with a = 1 and b = 4, thus

x_{vertex} = - \frac{4}{2} = - 2

Substitute t = - 2 into h(t) for y- coordinate

h(- 2) = (- 2)² + 4(- 2) + 3 = 4 - 8 + 3 = - 1

Vertex = (- 2, - 1 )

4 0
3 years ago
Katie blows up a balloon and ties it so there is a fixed amount of air in the balloon.
kifflom [539]

Answer:

According to Charles' Law the order of arrangement of the location where the balloon has the smallest size to the location where the balloon has the largest size is given as follows;

A freezer < A cold refrigerator < A normal room temperature classroom < A warm cupboard

Step-by-step explanation:

The parameter of the balloon Katie blows are;

The amount of air in the balloon = Fixed (constant)

The initial size of the balloon = The length of the measured string

The locations in which the balloon can be placed = A freezer, a warm cupboard, a cold refrigerator, a normal temperature classroom

The size of the balloon is given by the volume of the balloon

according to Charles' Law, the volume of a given mass of gas is directly proportional to its temperature

Mathematically, Charles law can be expressed as follows;

V ∝ T

Therefore, as the temperature to which the balloon is subjected decreases, the volume decreases

The locations arranged in order of increasing temperature is given as follows;

Freezer < Cold refrigerator < Normal temperature classroom < Warm cupboard

Given that Katie blow's the balloon in a normal temperature classroom, according to Charles Law, we have;

The temperature of the air in the balloon decreases largely in a freezer, therefore, the size of the balloon largely decreases

The temperature of the air in the balloon increases in a warm cupboard, therefore, the size of the balloon increases

The temperature of the air in the balloon decreases slightly in a cold refrigerator, therefore, the size of the balloon decreases

The temperature of the air in the balloon remains the in a normal temperature classroom, therefore, the size of the balloon remains the same

The size of the balloon reduces the most in a freezer

The size of the balloon increases in a warm cupboard

The size of the balloon decreases slightly in a cold refrigerator

The size of the balloon remains the same in a normal temperature classroom.

8 0
3 years ago
What is the lateral surface area of the cone?
hoa [83]

Answer:

135 pi centimeters squared

Step-by-step explanation:

Hello!

where la is lateral surface area

first \: the \: formula \: for \: the \: lateral \: surface \: are \: of \: cone \: is \\ la = \pi \times r \times l \\ where \: r = radius \\ l = slant \: height \\ therefore.first \: find \: the \: radius(r) =  \frac{d}{2}  \\ r =  \frac{18cm}{2}  = 9cm \\ so \: as \: we \: have \: the \: radius \: we \: can \: solve \: for \: the \: la \\ la = \pi \times r \times l \\ la = \pi \times (9cm) \times (15cm) \\ la = 135\pi \: cm {}^{2}

4 0
2 years ago
What value of x makes the equation true? 4x - 3= -9 + 7x
uysha [10]

Answer:

x = 2

Step-by-step explanation:

To find the x-value that makes the equation true, we would have to solve for x in the equation. To do that, we would have to get the equation in the form x = _. That would be our answer.

4x - 3 = -9 + 7x

Add 9 to both sides to get rid of the -9 on the right side.

4x - 3 + 9 = 7x

Simplify.

4x + 6 = 7x

Subtract 4x from both sides to get rid of the 4x on the left side.

6 = 7x - 4x

Simplify.

6 = 3x

3x = 6

Divide both sides by 3 to get rid of the coefficient of 3 on the left side.

x = 6/3

Simplify.

x = 2

So, the x-value that makes the equation true would be 2.

I hope this helps. :)

4 0
4 years ago
Read 2 more answers
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