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2 years ago

HELP PLEASE!!!

Mathematics

2 answers:

olchik [2.2K]2 years ago

7 0

Answer:

A number or number sentence that doesn't change

Step-by-step explanation:

melisa1 [442]2 years ago

6 0

Answer:

the constant of proportionality k, is the constant value of the ratio of two proportional quantities y and x

Step-by-step explanation:

k = y/x or y= kx

example : the cost of 20 books is rs. 180 how much will 15 books cost ?

a. rs. 125

b. rs. 130

c. rs. 135

d. rs. 140

answer is c. rs. 135

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What is the midpoint of (10,6) and (4,9)

Leona [35]

Answer:

The midpoint is (7,7.5)

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2 years ago

Select the expression that represents the following statement: 52 minus 4 times the difference of 13 and 7.

vampirchik [111]

Answer:

(52 - 4) * (13 - 7)

Step-by-step explanation:

<u>Step 1: Convert words into an expression</u>

52 minus 4 times the difference of 13 and 7.

(52 - 4) * (13 - 7)

Answer: (52 - 4) * (13 - 7)

If needed simplify

(52 - 4) * (13 - 7)

48 * 6

288

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2 years ago

Ph testing strips are selling for $2.25 per packet of 80 strips. How many while packets can you buy for $18?

Natali [406]

8 packets of Ph testing strips

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2 years ago

The pentagonal prism has a perpendicular distance of 14 units between the bases. The volume of the prism is 840 cubic units. Wha

Leno4ka [110]

Answer:

Option 4. Perimeter = 30 units

Step-by-step explanation:

Since the volume of a pentagonal prism is 840 cubic units.

Perpendicular distance between the bases = 14 units

We know volume of a pentagonal prism = Area of base × distance between the bases

840 = Area × 14

Area = 840/14 = 60 square units

Now area of a pentagon

$A=\frac{a^{2}}{4}\times\sqrt{5(5+2\sqrt{5})}$

$1.72a^{2}=60$

$a^{2}=\frac{60}{1.72}=34.90$

$a=\sqrt{34.9}=5.91$

Therefore perimeter of the pentagon = 5×a = 5×5.91 = 29.54 ≈ 30 units

8 0

2 years ago

PLEASE HELP ME!!!!!!!!

Delicious77 [7]

Angle θ between two vectors is given by, $\theta =cos^{-1}( \frac{u
 \cdot v}{|u||v|} )$ ; where $u \cdot 
v=-5(-4)+(-4)(-3)=20+12=32$ ; $|u|= \sqrt{ (-5)^{2} + (-4)^{2} } = 
\sqrt{25+16} = \sqrt{41}$ and $|v|=\sqrt{ (-4)^{2} + (-3)^{2} } = 
\sqrt{16+9} = \sqrt{25}=5$ .
Therefore, $\theta =cos^{-1}( \frac{32}{ 5\sqrt{41}} )=cos^{-1}0.9995=1.8^o$

3 0

2 years ago