2 years ago

If you are good at science pls answer these questions (only 4 questions)

Mathematics

1 answer:

igomit [66]2 years ago

4 0

#19 - amphibians do not produce amniotic eggs. Therefore they must lay their eggs in water so they don't dry out

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Evaluate the expression if x = −4, y = 10, z = −9. Expression: x - y - z *

Citrus2011 [14]

Answer:

Step-by-step explanation:

-4 - 10 + 9 = -14 + 9 = -5

8 0

3 years ago

Find the sum 7a/a+5 + a/a-2

IRINA_888 [86]

$\dfrac{7a}{a+5}+\dfrac{a}{a-2} \\\dfrac{7a(a-2)+a(a+5)}{(a+5)(a-2)} \\\boxed{\dfrac{a(8a-9)}{(a+5)(a-2)}}$

Hope this helps.

8 0

2 years ago

The two trapezoids below are similar. What is the length of EF?

Nastasia [14]

Answer:

x/24 = 7.5/30

30x = 180

________

x= 6

3 0

2 years ago

The density of a certain material is such that it weighs 71 pounds for every 2.5 gallons of volume. Express this density in tons

kvasek [131]

Answer:

$d=3.75\ \text{tons per cubic meter}$

Step-by-step explanation:

Given that,

Mass of a certain material, m = 71 pounds

Since, 1 ton = 2000 pounds

71 pounds = 0.0355 ton

Volume of the material, V = 2.5 gallons

Since, 1 m³ = 264.172 gallon

2.5 gallon = (2.5/264.172 ) m³

Density,

$d=\dfrac{m}{V}\\\\d=\dfrac{0.0355\ \text{tons}}{\dfrac{2.5}{264.172}\ m^3}\\\\d=3.75\ \text{tons per cubic meter}$

5 0

2 years ago

Consider the function f(x)= x^2 and the function g(x) shown below. how will the graph of g(x) differ from the graph of f(x)

malfutka [58]

Answer:

f(x) = x^2

g(x) = 4*x^2

=> For a value of x, the g(x) is 4 times larger than f(x).

=> g(x) is the stretched version of f(x) with stretched ratio = 4).

=> Option D is correct

Hope this helps!

3 0

3 years ago

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