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3 years ago

11

A bad contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every black marble. How many red m

arbles are in a bag

1 answer:

makkiz [27]3 years ago

6 0

I think that would be 40 correct me if I’m wrong

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Please help I need to get this done

hichkok12 [17]

Answer:

48

Step-by-step explanation:

So you take 7x-92+6x+12=180

And then you get x=20

Plug in 20 for x for <LOM

And you get and you get 48

Hope this helped!!

3 0

3 years ago

10×10×25= show your work please

zalisa [80]

10 ×10 = 100
100 ×25 = 2500
so your answer is 2500

3 0

3 years ago

Read 2 more answers

Select the three ratios that are equivalent to 3 boys/5 girls.

Stels [109]

$\dfrac{3\ boys}{5\ girls}\to\dfrac{3}{5}\\\\\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\\\\\dfrac{15}{25}=\dfrac{15:5}{20:5}=\dfrac{3}{5}\\\\\dfrac{9}{15}=\dfrac{9:3}{15:3}=\dfrac{3}{5}\\\\\dfrac{30}{50}=\dfrac{30:10}{50:10}=\dfrac{3}{5}\\\\Answer:\\\\\boxed{\dfrac{3\ boys}{5\ girls}=\dfrac{15\ boys}{25\ girls}=\dfrac{9\ boys}{15\ girls}=\dfrac{30\ boys}{50\ girls}}$

6 0

3 years ago

Read 2 more answers

PLSSS HELP Simplify.<br><br> –2 + (–9)

Usimov [2.4K]

Answer:

-11

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Verify the identity. cotangent x equals StartFraction 1 plus cosine 2 x Over sine 2 x EndFractioncot x= 1+cos2x sin2x Use the ap

lutik1710 [3]

Answer with Step-by-step explanation:

We are given that

RHS

$\frac{1+Cos2x}{Sin2x}$

We have to verify the identity.

We know that

$1+Cos2x=2Cos^2 x$

$Sin2x=2SinxCos x$

Using the formula

$\frac{2Cos^2x}{2SinxCosx}$

$\frac{Cosx}{Sinx}$

$Cot x$

By using the formula

$Cotx=\frac{Cosx}{Sinx}$

LHS=RHS

Hence, verified

6 0

4 years ago