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3 years ago

A bag contains 12 red marbles The ratio of red marbles to blue marbles is 4:3?

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

8 0

There are 9 blue marbles.

Step-by-step explanation:

12÷4=3

3×3=9

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PLS help simple math properties ASAP needing 5 and 6 that’s all :)

RoseWind [281]

They both seem to be substitution

4 0

3 years ago

What’s the correct answer for this question?

aksik [14]

Answer:

Step-by-step explanation:

Density = Mass/ Volume

2 = 8 / V

V = 8/2

V = 4 cubic cm

3 0

3 years ago

Read 2 more answers

Help this question is due in like 15 minutes :p

fomenos

Answer:

A= 150°

B=30°

C=150°

Step-by-step explanation:

Since a line is 180°, you can write an equation for C. C+30°=180° , from here use algebra to find C. The value of C will be 150°. When the value of C is 150° , since they're supplementary angles, the value of A will also be 150°.

Important thing to note:

The value of all these angles combined together is 360°.

5 0

3 years ago

A random sample of 38 wheel chair users were asked whether they preferred cushion type A or B, and 28 of them preferred type A w

-BARSIC- [3]

Answer:

The statement that cushion A is twice as popular as cushion B cannot be verified

Step-by-step explanation:

From the question we are told that:

Sample size n=38

Type a size A $X_a=28$

Type a size B $X_b=10$

Generally the probability of choosing cushion A P(a) is mathematically given by

$P(a)=\frac{28}{38}$

$P(a)=0.73$

Generally the equation for A to be twice as popular as B is mathematically given by

$P(b)+2P(b)=3P$

Therefore Hypothesis

$Null H_0: p \leq \frac{2P}{3P} \\Altenative H_A:p>\frac{2P}{3P}$

Generally the equation normal approx of p value is mathematically given by

$z=\frac{x-np_0-0.5}{\sqrt{np_0(1-p_0)} }$

$z=\frac{28-(38*2/3)_0-0.5}{\sqrt{38*2/3*1/3} }$

$z=0.75$

Therefore from distribution table

$Pvalue=1-\theta (0.75)$

$Pvalue=0.227$

Therefore there is no sufficient evidence to disagree with the Null hypothesis $H_0$

Therefore the statement that cushion A is twice as popular as cushion B cannot be verified

7 0

3 years ago

D2 =81-1 find the positive value of d that makes the equation true

Lubov Fominskaja [6]

81-1= 80
80 / 2 = 40
D = 40
So:
40(2) = 81 - 1

4 0

3 years ago