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3 years ago

The simplest form of sqrt 80 can be written as a sqrt b where a = and b =

Mathematics

2 answers:

viktelen [127]3 years ago

6 0

Answer:4 and 5

Step-by-step explanation:

A is 4 B is 5

Zanzabum3 years ago

5 0

The square root of 80 can be broken up into the square root of 16 x square root of 5. We know that the square root of 16 is 4. So in the form (a sqrt b)

A would be 4 and b would be 5.

Answer: 4 sqrt 5

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Find the midpoint of the segment with the following endpoints. (-10,2) and (-5,-1)

Sergeu [11.5K]

Given:

(-10, 2) & (-5, -1)

Add x values separately; add y values separately:

(-15, 1)

Divide x and y values by 2:

(-7.5, 0.5); midpont

5 0

2 years ago

Read 2 more answers

Marsha’s scores on seven tests were: 82, 78, 77, 93, 85, 91, and 86. What does she need to score on her next test to have an 86

Naddika [18.5K]

Answer:

The score of her next test is 96

Step-by-step explanation:

<em>If there is a set of data with x terms, then the average is the sum of their values divided by x</em>

<em>Average = sum of values of the x terms ÷ x</em>

We will use this rule to solve the question

∵ Marsha's scores on 7 test were 82, 78, 77, 93, 85, 91, 86

→ Find her total scores on the seven tests

∴ Her total scores = 82 + 78 + 77 + 93 + 85 + 91 + 86 = 592

∴ Her total scores on the 7 tests is 592

∵ Her average score on the 8 test is 86

→ Use the rule of the average to find her total score in the 8 test

∵ 86 = total scores ÷ 8

→ Multiply both sides by 8

∴ 86 × 8 = total scores × 8 ÷ 8

∴ 688 = total scores

∴ Her total scores on the 8 tests is 688

∵ Her total scores on the 7 test = 592

∵ Her total scores on the 8 test = 688

→ The difference between both totals is the score of her next test

∴ The score of her next test = 688 - 592 = 96

∴ The score of her next test is 96

8 0

3 years ago

A radio-controlled helicopter sells for $20, but needs a lithium battery that costs 25% of that price. A sales tax of 6% will be

Diano4ka-milaya [45]

Answer:

The total cost of the helicopter = $26.5

The cost of lithium battery = $5.

The amount of sales tax = $1.5

Step-by-step explanation:

We have been given that a radio-controlled helicopter sells for $20, but needs a lithium battery that costs 25% of that price.

We can find the price of battery by finding 25% of 20.

$\text{The cost of lithium battery}=\frac{25}{100}\times 20$

$\text{The cost of lithium battery}=\frac{25}{5}$

$\text{The cost of lithium battery}=5$

Therefore, the cost of lithium battery is $5.

Now let us find the sales tax on the cost of helicopter and lithium battery.

$\text{Total sales tax}=\frac{6}{100}\times (20+5)$

$\text{Total sales tax}=0.06\times (25)$

$\text{Total sales tax}=1.5$

Therefore, the total sales tax will be $1.5.

We can find the total cost of helicopter by adding the cost of helicopter, cost of lithium battery and total amount of sales tax.

$\text{The total cost of helicopter}=20+5+1.5$

$\text{The total cost of helicopter}=26.5$

Therefore, the total cost of helicopter will be $26.5.

4 0

3 years ago

1/2 of 30= 1/4 of [ ]

MaRussiya [10]

Answer:

Step-by-step explanation:

half of 30 is 15

and 15 is 1 quarter of 60

7 0

3 years ago

Um........ Help? With step by step explanation

Elina [12.6K]

Answer:

$7.50

Step-by-step explanation:

15% of 50=7.5

5 0

2 years ago