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klemol [59]
4 years ago
7

Simplify the expression (x+5)(x-7)

Mathematics
1 answer:
marishachu [46]4 years ago
5 0
( x + 5 ) ( x - 7 )

( x ) ( x ) +  ( x ) ( - 7 ) + ( 5 ) ( x ) + ( 5 ) ( - 7 )

x² - 7x + 5x - 35

= x² - 2x - 35.
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A player on a school baseball team reaches first base 7/10 of the time he is at bat. Out of 50 times at bat, how many times woul
riadik2000 [5.3K]

Answer:

35

Step-by-step explanation:

You can find it by multiplying the decimal of the fraction (In this case it's 0.7) by however many times it's happening (50).

0.7 x 50 = 35

3 0
3 years ago
Please help me :(
stiv31 [10]

Answer:

Step-by-step explanation:

Cos \ D = \dfrac{adjacent \ side \ of angle \ D}{hypotenuse}\\\\\\ Cos \ D = \dfrac{72}{75}\\\\\\Cos D = \dfrac{24}{25}

5 0
3 years ago
Fixed Object Involved in Collision Number of Collisions Pole/post 1,416 Culvert/curb/ditch 2,516 Shrubbery/tree 2,585 Guardrail
Genrish500 [490]

Answer:

0.1358 = 13.58% probability of a fatal collision with a pole or post

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this question:

1416 collisions with pole or post.

1416 + 2516 + 2585 + 896 + 947 + 231 + 1835 = 10426 total collisions.

a. What is the probability of a fatal collision with a pole or post?

p = \frac{1416}{10426} = 0.1358

0.1358 = 13.58% probability of a fatal collision with a pole or post

3 0
3 years ago
Step 1: Subtract 3 from both sides of the inequality.
zlopas [31]
5 - 8x < 2x + 3

5 - 8x < 2x + 3
<u>-3               - 3 </u> Step 1.
2 - 8x < 2x
<u>   +8x    +8x    </u> Step 2. Missing step
2        < 10x
<u>÷10        ÷10</u>   Step 3.
<u>2/10   < x</u>
<u>1/5     < x

The missing step is add 8x to both sides of the inequality.</u>
6 0
3 years ago
Read 2 more answers
If aₙ = 3(3)ⁿ⁻¹ , what is S₃?<br><br> 12<br><br> 27<br><br> 9<br><br> 39
Allushta [10]

Answer:

S_3=39

Step-by-step explanation:

The nth term of the sequence is

a_n=3(3)^{n-1}

To get the first term, substitute n=1,

a_1=3(3)^{1-1}=3

To get the second term, substitute n=2,

a_2=3(3)^{2-1}=9

To get the third term, substitute n=3,

a_3=3(3)^{3-1}=27

The sum of the first three terms is

S_3=3+9+27=39

We could also use the formula

S_n=\frac{a_1(r^n-1)}{r-1} to get the same result.

8 0
3 years ago
Read 2 more answers
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