3 years ago

What is the algbraic expression for 2(x - 7) + 10

Mathematics

2 answers:

Step2247 [10]3 years ago

8 0

Answer:

Two times the difference of x and seven plus ten

Step-by-step explanation:

pantera1 [17]3 years ago

4 0

Answer:

2x - 4

Step-by-step explanation:

Expand the brackets:

2(x-7) = 2x - 14

Add 10:

2x - 14 + 10

= 2x - 4

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Find the missing side length. Round to the nearest tenth.<br>15 cm<br>9 cm

vazorg [7]

Using Pythagorean’s theorem
a^2 +b^2= c^2
We know
c=15
b=9
a=?
Sub that in the Pythagorean’s theorem
a^2+9^2 = 15^2
a^2 + 81 = 225
a^2= 225-81
a^2 = 144
a= square root of 144
a= 12

Therefore the answer is 12

5 0

3 years ago

What is the solution to the system of equations y= -3x+6 and y =9

Lilit [14]

Plug the value of 9 in for y
9=-3x+6

Subtract 6 from both sides
3=-3x

Divide both sides by -3
-1=x

Final answer: x=–1

7 0

3 years ago

Numbered disks are placed in a box and one disk is selected at random. If there are 6 red disks numbered 1 through 6, and 2 yell

Tatiana [17]

Answer:

$\frac{3}{4}$

Step-by-step explanation:

Total number of red disk=6

Total number of yellow disk=2

Total disk=6+2=8

Odd number=1,3,5,7=4

Odd number on red disk=1,3,5=3

Probability, $P(E)=\frac{favorable\;cases}{total\;number\;of\;cases}$

Using the formula

The probability of getting odd number disk= $\frac{4}{8}=\frac{1}{2}$

The probability of getting odd numbered red disk= $\frac{3}{8}$

The probability of selecting a red disk,given that an odd numbered disk is selected= $\frac{\frac{3}{8}}{\frac{1}{2}}=\frac{3}{8}\times 2=\frac{3}{4}$