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3 years ago

Add or subtract.

Mathematics

1 answer:

creativ13 [48]3 years ago

5 0

Answer:

a. 1 3/4 + 2 1/4 = 4

b. 7/3 or 2 1/3 = 5 2/3 - 3 1/3

c. 8 5/6 - 3 4/6 = 5 1/6

Step-by-step explanation:

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Tim has x beads. Amy has two more beads than Tim. Sarah has five times as many beads as Amy. How many beads does Sarah have?

Gnesinka [82]

Answer:well we need to know how mmch tim has so like

x?+2 is amy

x?+2*5 is sarah

Step-by-step explanation:

7 0

3 years ago

Quick math question, please help^^

Contact [7]

Answer:

x= 81

Step-by-step explanation:

see attached the solution

4 0

3 years ago

A regular hexagonal prism has a height of 7 cm and base edge length of 4 cm. Identify its lateral area and surface area. HELP AS

prohojiy [21]

Answer:

Lateral Surface Area = 168 $cm^2$

Total Surface Area = 209.57 $cm^2$

Step-by-step explanation:

Given:

There is a regular hexagonal prism with

Height, h = 7 cm

Base edge length, a = 4 cm

To find:

Lateral surface area and total surface area = ?

Solution:

Formula for lateral surface area is given as:

$LSA = \text{Perimeter of Base}\times Height$

Perimeter of a hexagon is given as:

$P = 6 \times Edge\ Length\\\Rightarrow P = 6\times 4=24\ cm$

Now, LSA = 24 $\times$ 7 = 168 $cm^2$

Total Surface area of prism is given by the formula:

$TSA = LSA + B$

where B is the area of base.

Base is a regular hexagon, formula for area of a regular hexagon is given by:

$B =6\times \dfrac{\sqrt3}4\times Edge^2\\\Rightarrow B =6\times \dfrac{\sqrt3}4\times 4^2 = 24\sqrt3\ cm^2\\\Rightarrow B = 41.57 cm^2$

So, Total Surface Area = 168 + 41.57 = 209.57 $cm^2$

So, answer is :

Lateral Surface Area = 168 $cm^2$

Total Surface Area = 209.57 $cm^2$

3 0

3 years ago

If the solutions of p(x)=0 are -14 and 11, which function could be p?

marissa [1.9K]

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Solution :

$x = - 14$

$x = 11$

Thus ;

$x+ 14 = 0$

$x - 11 = 0$

Multiply above equations :

$(x + 14)(x - 11) = 0$

${x}^{2} + ( 14 - 11)x +( \: ( 14) \times ( - 11) \: ) = 0 \\$

${x}^{2} + 3x - 154 = 0$

So ;

$p(x) = {x}^{2} + 3x - 154$

Thus the correct answer is (( D )) .

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7 0

3 years ago

Help pls pls pls pls pls pls pls

sergiy2304 [10]

Answer:

485

Step-by-step explanation:

Q(-9) = 6(-9)² - 1 = 6×81 - 1 = 486 - 1 = 485

8 0

3 years ago