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3 years ago

10

Thanks for helping me with these stupid qiestions

2 answers:

Tju [1.3M]3 years ago

4 0

The answer to this question is D

ziro4ka [17]3 years ago

4 0

Answer: B, raisins

Step-by-step explanation:

The total of all the pieces in the handful Ren is 18(6+4+3+5). He now picks up 9 pieces and for every 9 pieces, there are 2 of something. Let's put it in a ratio, 9:2. To make the 9 equal to the original amount, multiply by 2. So 9:2 times 2 equals 18:4. The raisins have 4, therefore the answer is B. In simpler terms, 9:2. 9x2=18 So you so the same for the other side. 2x2=4 so look for the one that started as 4.

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Given the function f(x) = −2x + 8, find x if f(x) = 14 ...?

Over [174]

14 = - 2x + 8
2x = - 6
x = - 3

5 0

4 years ago

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There are 158 students registered for American History classes. There are twice as many students registered in second period as

Margarita [4]

There are 28 students in first period and 56 students in sceond period and 74 students in third period

<em><u>Solution:</u></em>

Let the number of students in first period be "x"

Let the number of students in second period be "y"

Let the number of students in third period be "z"

<em><u>There are 158 students registered for American History classes.</u></em>

Therefore,

x + y + z = 158 ---------- eqn 1

<em><u>There are twice as many students registered in second period as first period</u></em>

number of students in second period = twice of number of students in first period

y = 2x ------- eqn 2

<em><u>There are 10 less than three times as many students in third period as in first period</u></em>

number of students in third period = 3 times number of students in first period - 10

z = 3x - 10 ------ eqn 3

<em><u>Substitute eqn 2 and eqn 3 in eqn 1</u></em>

x + 2x + 3x - 10 = 158

6x = 168

<h3>x = 28</h3>

<em><u>Substitute x = 28 in eqn 2</u></em>

y = 2(28)

<h3>y = 56</h3>

<em><u>Substitute x = 28 in eqn 3</u></em>

z = 3(28) - 10

z = 84 - 10

<h3>z = 74</h3>

Thus there are 28 students in first period and 56 students in sceond period and 74 students in third period

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3 years ago

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Sladkaya [172]

Answer:

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Step-by-step explanation:

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3 years ago

Given: △ABC; AB=BC, m∠BDA = 60°, BD=4 cm, BD ⊥ BA . Find: DC, AC.

vekshin1

Answer:

DC = 10.93 cm , AC = 9.8 cm

Step-by-step explanation:

From trigonometry;

⇒ Tan 60 = AB/BD

⇒AB = BD Tan 60 ( where BD = 4 cm )

⇒ AB = 6.93 cm

Also, AB=BC , therefore;

⇒ BC = 6.93 cm

⇒ Cos 60 = BD/AD

⇒ AD = BD/ Cos 60 = 4/Cos 60

⇒ AD = 8 cm

From Pythagoras theorem;

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3 years ago

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Answer:

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Step-by-step explanation:

I figured it out in my head.

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3 years ago

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