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2 years ago

If u answer please I will mark you as brainliest answer....

Mathematics

1 answer:

Irina18 [472]2 years ago

6 0

I would say (C.) because the scientist only looked for the presence for both not just nickel or just lead.
Hope that helps.......if wrong I apologize.

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Help is needed please

enyata [817]

Answer:

28.8

Step-by-step explanation:

23+2x+3x+13=180 simplify the left side

5x+36=180 subtract 36 from both sides

5x=144 divide both sides by 5 to isolate the variable

x=28.8

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20%7Ba%20%7D%5E%7B2%7D%20%20%2B%208a%20%2B%2015%20%3D%200" id="TexFormula1" title=" {a }^{2}

NISA [10]

Answer:

a = - 5, a = - 3

Step-by-step explanation:

Given

a² + 8a + 15 = 0 ← in standard form

(a + 3)(a + 5) = 0 ← in factored form

Equate each factor to zero and solve for a

a + 3 = 0 ⇒ a = - 3

a + 5 = 0 ⇒ a = - 5

8 0

3 years ago

Ned has 55 marbles in his collection he has twice as many white marbles as red marbles he has five more blue marbles than white

nika2105 [10]

Answer:

7 marble's

Step-by-step explanation:

55 marbles and twice as many white marbles as red marbles and he has 5 more blue marbles than white marble's

4 0

2 years ago

Can anybody help me out

VashaNatasha [74]

Answer:

1. There are 8 big fish for every 10 small fish.

2. There are 4 big fish for every 5 small fish.

5 0

3 years ago

Rata-rata markah matematik untuk Amin, azman dan aziz adalah 73. Tanda Azman lebih 35 berbanding Amin manakala aziz dua kali gan

vagabundo [1.1K]

Answer:

The Amin's score in math was 46.

Step-by-step explanation:

The question is:

The average math score for Amin, azman and aziz is 73. Azman marks 35 more than Amin while aziz is twice that of Amun. What is Amin's sign?

Solution:

Let us denote that:

x = Amin's score in math

y = Azman's score in math

z = Aziz's score in math.

The average of x, y and z is, 73.

That is:

$\frac{x+y+z}{3}=73\\\\\Rightarrow x+y+z = 219$

Now it is provided that:

$y=x+35...(i)\\z=2x...(ii)$

Use the equations (i) and (ii) to determine the value of x as follows:

$x+y+z=219\\\\x+x+35+2x=219\\\\4x=184\\\\x=46$

Thus, the Amin's score in math was 46.

6 0

3 years ago