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3 years ago

The sum of 2 times a number and 4 equals 3 HELP ASAP

Mathematics

2 answers:

Olegator [25]3 years ago

7 0

Answer:

-1/2

Step-by-step explanation:

you have to make it like this and use a variable:

2x+4=3

take away 4 from both sides:

2x= -1

divide by 2:

x = -1/2

AlexFokin [52]3 years ago

5 0

Answer:

The number is - ½

Step-by-step explanation:

Let the missing number be x

2x + 4 = 3

2x = 3 - 4

2x = - 1

x = - ½

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If the hypotenuse is 41 inches and one of the legs is 40 inches, what is the length of the other leg in inches

timama [110]

9 inches
a^2=b^2+c^2
a=41 inches
b=40 inches

7 0

3 years ago

PLEASE HELPPPPPP!!!!!!Solve this system of linear equations separate the x-and y-values with a comma

GenaCL600 [577]

Answer:

$x=-6,\\y=6$

Step-by-step explanation:

Rewrite the system of equations as:

$\begin{cases}-13x+2y=90\\-6x+2y=48\end{cases}$

Subtract the second equation from the first to isolate $x$ :

$-13x+2y-(-6x+2y)=42,\\-7x=42, \\\fbox{$x=-6$}$

Plug in $x=-6$ into any of the equations above and solve for $y$ :

$-6(-6)+2y=48,\\2y=12,\\\fbox{$y=6$}$

Verify that the solution pair $(-6, 6)$ works $\checkmark$

Therefore, the solution to this system of equations is:

$x=-6,\\y=6$

8 0

3 years ago

Tom's red bicycle travels 50 ft for every 2 pedal turns. How many pedal turns are needed to travel a mile?

postnew [5]

Answer:

211.2 pedal turns

Step-by-step explanation:

50/2 = 25 feet every pedal turn

5280 feet in a mile

5280/25 = 211.2

5 0

3 years ago

What 20×10 to the power of 3r power

ArbitrLikvidat [17]

20 × 10 to the 3rd power is 10000

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3 years ago

If the area of a circle is

ozzi

Answer:

Since area =7.7

$area = \frac{22}{7} {(r)}^{2} \\ {(r)}^{2} = 2.45 \\ r = 1.57$

Then the circumference is

$c = 2pi\times r \\ = 2 \times 3.14 \times 1.57 \\ = 9.859$

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3 years ago