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3 years ago

I need answer Immediately!!!!!!

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

7 0

Step-by-step explanation:

number of hours = more than 12

above 80= 16

total sat = 33

percentage above 80 = 16 / 33 * 100

= 48.48%

to the nearest whole number = 48%

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What number must you add to complete the square? x^2+26x=33

katrin2010 [14]

Answer:

Must add: 202

Step-by-step explanation:

$The \ formula \ for \ perfect \ square => (a + b)^2 = a^2 + 2ab + b^2$

a = x

2ab = 26x

2ab = 26a [ substitute a instead of x]

$b = \frac{26a}{2a}$

b= 13

So,

$(x + 13)^2 = x^2 + 26x + 169$

But given equation is :

$x^2 + 26x = 33\ => \ x^2 + 26x -33 = 0$

We have find the difference between 169 and -33 to get the number that should be added to get the perfect square.

That is , 169 - (-33) = 202

Therefore ,

$x^2 + 26x -33 + 202 \ makes \ given \ equation \ a \ perfect \ square$

8 0

3 years ago

A construction company orders 12 tons of pea gravel how many pounds of pea gravel do they order

poizon [28]

Each ton is equal to 2,000 pounds, therefore each ton (12) times the number of pounds per ton (2,000) is 24,000 pounds! Hope this helps!!

6 0

4 years ago

John shot a toy rocket into the air. Consider the graph below which shows the relationship between the height of the rocket from

EleoNora [17]

<h2>The height of the rocket increases for some time and then decreases for some time.</h2>

The height from the ground increases from 4 to 26, then decreases from 26 to 0.

Why the others are wrong.

A. The height of the rocket changes at a constant rate for the entire time.

The graph is a curve. This means the rate is not constant. If it were constant, the graph would be linear - a straight line.

C. The height of the rocket remains constant for some time.

The graph is a curve. This means the rate is not constant. If it were constant, the graph would be linear - a straight line.

D. The height of the rocket decreases for some time and then increases for some time.

This implies the graph decreases first then increases. However, the rocket will increase, then decrease.

5 0

3 years ago

How do you solve this?

lutik1710 [3]

$\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{8^?}{8^3}=\cfrac{1}{8^8}\implies \cfrac{8^?}{8^3}=8^{-8}\implies 8^?=8^3\cdot 8^{-8}\implies 8^?=8^{3-8}\implies 8^?=8^{-5}$

$\bf \begin{array}{llll} \textit{if the bases are the same, for}\\ \textit{the equation to be true, the}\\ \textit{exponents must also be the same} \end{array}~\hspace{5em}?=-5 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{1}{r^3}=r^{-7}\cdot r^?\implies r^{-3}=r^{-7+?}\implies \stackrel{\textit{bases are the same, so are the exponents}}{-3=-7+?\implies 4=?}$

7 0

3 years ago

a square field has an area of 2000 square feet. to the beat fest foot, how much fencing would be needed to enclose the field

swat32

Answer:

180 feet

Step-by-step explanation:

√2000 = 44.8

44.8 x 4 = 179.2 = 180 feet

5 0

4 years ago