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Sonja [21]
2 years ago
6

Evaluate this expression. -86.4 + 16.38

Mathematics
2 answers:
iris [78.8K]2 years ago
5 0

Answer:

-70.20

Step-by-step explanation:

vlada-n [284]2 years ago
3 0

Answer:

The answer is -70.22

Step-by-step explanation:

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A used bookstore will trade 2 of its books for 3 of yours. If Val brings in 18 books to trade, How many books can she get from t
dolphi86 [110]

Answer:

She will get 12 books from the store

Step-by-step explanation:

We can use ratio's to solve

2 books out      x books out

------------------- =-----------------------------

3 books in          18 books in from Val


Using cross products

2 * 18 = 3 *x

Divide each side by 3

2*18 /3 = 3x/3

2*6 = x

12 =x

She will get 12 books from the store

8 0
3 years ago
Read 2 more answers
Find the value of x in the below complementary angle 3x(5x+2)​
Natali [406]

Answer:

The value of x is 11

Step-by-step explanation:

<em>Two angles are complementary if the sum of their measures is 90°</em>

Let us use this rule to solve our question

∵ The angle of measure (3x)° and the angle of measure (5x + 2)°

   are complementary angles

→ That means their sum equals 90°

∴ 3x + 5x + 2 = 90

→ Add the like terms in the left side

∵ (3x + 5x) + 2 = 90

∴ 8x + 2 = 90

→ Subtract 2 from both sides to move 2 from the left side to the right side

∵ 8x + 2 - 2 = 90 - 2

∴ 8x = 88

→ Divide both sides by 8 to find x

∵ 8x/8 = 88/8

∴ x = 11

∴ The value of x is 11

7 0
3 years ago
Which is the most effective brand name shoe. is it Experimental vs. Observational
balandron [24]

Answer:

nike its observational

Step-by-step explanation:

6 0
2 years ago
The factors of a number are given below:<br>1,2,4,5,8,10,16, 20, 40, 80<br>What is the number?​
____ [38]

Answer:

80

Step-by-step explanation:

80 is divisible by all of the factors given.

3 0
2 years ago
Read 2 more answers
Find the equation of the line through the point (2, 5) that cuts off the least area from the first quadrant. Give your answer us
Amanda [17]

The equation of the line would be

y = mx+b 

where m is the slope, b is the y intercept. 

<span>The line will form a triangular region in the first quadrant. Its area would be 1/2 base times height. The height is the y intercept and the base is y intercept divided by slope. Therefore,</span>

A = b^2/2m

At point (2,5)

5 = 2m+b

Substitute that in the area

A = b^2/5-b to find the least area, differentiate the area with respect to the height and equate it to 0 

dA/db = 0

<span>find b and use that to find m. Then, you can have the equation of the line.</span>


4 0
2 years ago
Read 2 more answers
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