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2 years ago

What does +89 - (-17) equal?

Mathematics

2 answers:

Alekssandra [29.7K]2 years ago

5 0

Answer:

+ 115

Step-by-step explanation:

+ 89 - (- 17) = + 98 + 17 = + 115

AlekseyPX2 years ago

3 0

Answer:

106

Step-by-step explanation:

+89-(-17) = 89+17

=106

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A car travels 370 1/2 miles in 6 1/2 hours what is the average speed at which the car is traveling

Alex

Answer:

57 miles per hour

Step-by-step explanation:

Speed is equal to distance over time

I changed the fractions to decimals for ease of math

distance = 370 .5 miles

time = 6.5 hours

Speed = 370.5/6.5 = 57 miles/hour

7 0

4 years ago

A lawyer drives from her home, located 15 miles east and 28 miles north of the town courthouse, to her office, located 6 miles w

natali 33 [55]

Answer:

Step-by-step explanation:

I know the answer is 26 miles but I cannot figure out how they came up with that answer using the distance formula.It looks like you need to find the shortest distance (as the crow flies) between the home and the office.

Use the Pythagorean Theorem.

6^2 + 10^2 = c^2

136 = c^2

11.67 = c

4^2 + 14^2 = c^2

212 = c^2

14.56 = c

11.67 + 14.56 = 26.2 = 26 miles

4 0

3 years ago

132 packages of clay, 6 clay sticks in each package, 3 sticks go to each student. How many students are able make projects out c

spayn [35]

Answer: 264

Step-by-step explanation: 132 x 6 = 792

792 divided by 3 = 264

Hope this helps

7 0

4 years ago

48% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually

oksian1 [2.3K]

Answer:

There is no sufficient evidence to support the executive claim

Step-by-step explanation:

From the question we are told that

The population proportion is $p = 0.48$

The sample proportion is $\r p = 0.45$

The sample size is $n = 300$

The level of significance is $\alpha = 0.02$

The null hypothesis is $H_o : p= 0.48$

The alternative hypothesis is $H_a : p \ne 0.48$

Generally the test statistics is mathematically evaluated as

$t = \frac{\r p - p }{ \sqrt{ \frac{p(1 - p )}{n} } }$

=> $t = \frac{0.45 - 0.48 }{ \sqrt{ \frac{0.48 (1 - 0.48 )}{300} } }$

=> $t = -1.04$

The p-value is mathematically represented as

$p-value = 2P(z > |-1.04|)$

Form the z-table

$P(z > |-1.04|) = 0.15$

=> $p-value = 2 * 0.15$

=> $p-value = 0.3$

Given that $p-value > \alpha$ we fail to reject the null hypothesis

Hence we can conclude that there is no sufficient evidence to support the executive claim

5 0

3 years ago

Which of the following is equivalent to<br> ?<br> 60 ^1/2

Delvig [45]

Answer:

60^1/2 = 60^0.5 = sqrt 60 = 7.75

good luck :))) <3

5 0

3 years ago