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Lena [83]
2 years ago
15

X= ? The trainable a below are similar

Mathematics
1 answer:
ratelena [41]2 years ago
6 0

\frac{x + 7}{3x + 3}  =  \frac{19}{38} \\ \Leftrightarrow  \frac{x + 7}{3x + 3}  =  \frac{1}{2}  \\ \Leftrightarrow 2x + 14 = 3x + 3 \\ \Leftrightarrow x = 11

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The equation below shows the total volume (V),in cubic units, of 2 identical boxes with each side equal to s units:
mrs_skeptik [129]
A. 21.0 cubic units
2 × 3.5 × 3
8 0
3 years ago
Your family goes to a Southern-style restaurant for dinner. There are 7 people in your family. Some order the chicken dinner for
butalik [34]

Answer:

a) 4 people ordered streak dinner

b) 3 people ordered chicken dinner

Step-by-step explanation:

Let the number of people that ordered steak dinner be x

and the number of people that ordered chicken dinner be y

From the question,

There are 7 people in your family

Hence, we can write that

x + y = 7 ...... (1)

Also from the question

Some order the chicken dinner for $13 and some order the steak dinner for $18 and the total bill was $111.

We can then write that

13y + 18x = 111 ...... (2)

From equation (1)

x + y = 7

Then,

x = 7 - y ...... (3)

Put this into equation (2)

13y + 18x = 111

13y + 18(7 - y) = 111

13y + 126 - 18y = 111

-5y = -15

5y = 15

y = 15 / 5

y = 3

Put the value of y into equation (3) to get x

x = 7 - y

Then

x = 7 - 3

x = 4

Hence, 4 people ordered streak dinner

and 3 people ordered chicken dinner

a) 4 people ordered streak dinner

b) 3 people ordered chicken dinner

3 0
2 years ago
A safety officer wants to prove that μ = the average speed of cars driven by a school is less than 25 mph. Suppose that a random
Akimi4 [234]

Answer:

t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70    

The degrees of freedom are given by:

df=n-1=14-1=13  

The p value for this case would be given by:

p_v =P(t_{(13)}  

Step-by-step explanation:

Information given

\bar X=24 represent the mean height for the sample  

s=2.2 represent the sample standard deviation

n=14 sample size  

\mu_o =25 represent the value that we want to test

t would represent the statistic

p_v represent the p value for the test

Hypothesis to verify

We want to cehck if the true mean is lees than 25 mph, the system of hypothesis would be:  

Null hypothesis:\mu \geq 25  

Alternative hypothesis:\mu < 25  

The statistic would be given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing the info given we got:

t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70    

The degrees of freedom are given by:

df=n-1=14-1=13  

The p value for this case would be given by:

p_v =P(t_{(13)}  

8 0
2 years ago
In a school there are two sections - section A and section B or class X . There are 32 students in section A and 36 students in
jekas [21]

Just add 32 + 33 = 65. 65 would be the minimum amount.

7 0
3 years ago
Which of the following consists of equivalent fractions
NeTakaya
The first one is the only one that shows equivalent fractions

If correct brainliest please

Thank you and Your welcome

:)
3 0
3 years ago
Read 2 more answers
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