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2 years ago

ONLY NEED PART B HELP

Mathematics

1 answer:

bezimeni [28]2 years ago

4 0

Answer: 48 model cars

Step-by-step explanation: 1. You know that the ratio of the number of model cars that Jim owns to the number of model cars Terrence owns is 4:3.

2. Let's call the number of model cars that Jim owns is , therefore, you can solve the exercise as following:

3. Therefore, Jims owns 48 model cars.

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Help please on all of these

ollegr [7]

the answer is on the picture

6 0

2 years ago

Identify whether each phrase is an expression, equation, or inequality.

Strike441 [17]

Answer:

Step-by-step explanation:

Expression => | -2 |

Equation => 6 - 1 = 2 + 3

Inequality => 8^m > 64

8 0

2 years ago

Read 2 more answers

A large city newspaper periodically reports the mean cost of dinner for two people at restaurants in the city. The newspaper sta

inysia [295]

Answer: C) 133

Step-by-step explanation:

The formula to find the sample size is given by :-

$n=(\dfrac{z^*\cdot\sigma}{E})^2$

, where z* = Critical z-value

$\sigma$ = Population standard deviation for prior study.

E= Margin of error.

As per given , we have

$\sigma=$35$

E= 5

The critical z-value for 90% confidence level is 1.645.

Substitute al;l the value sin the above formula , we get

$n=(\dfrac{1.645\times 35}{5})^2$

$n=(\dfrac{57.575}{5})^2$

$n=(11.515)^2$

$n=132.595225\approx133$

Hence, the minimum sample size needed is 133.

Thus , the correct answer is : C) 133

6 0

3 years ago

3x - 20 = 4 PLEASE EXPLAIN HOW YOU GOT THE ANSWER IN STEPS!

sammy [17]

Answer:

x = 8

Step-by-step explanation:

3x - 20 = 4

add 20 to both sides

3x - 20 + 20 = 4 + 20

3x = 24

divide both sides by 3

$\frac{3x}{3}$ = $\frac{24}{3}$

x = 8

7 0

2 years ago

Please help with question 15 and 16!!!

kykrilka [37]

15. [4] insufficient information. only given SA
16. There are 3 right triangles, 3 Pythagorean theorem equations
x²+b²= 16²
12²+a² = x²
a²+4² = b²

combine equations using substitution to get in terms of only x
substitute b² for (a² +x²) in first equation
x²+a²+4²=16²
substitute a² for (x² - 12²)
x²+x²-12²+4² = 16²
solve for x
2x² - 144 + 16 = 256
2x² = 256 + 144 - 16
2x² = 384
x² = 384/2
x² = 192
x = 13.85

rounded to nearest tenth, x = 13.9

6 0

3 years ago