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3 years ago

Find the value of x. Give the answer in simplest radical form. PLEASE HELP

Mathematics

1 answer:

Dafna11 [192]3 years ago

5 0

The answer is 7 or 7.07. Hope this helps

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Share £60 in the ratio 1:4

Hitman42 [59]

Answer:

Let one no. be 1x

other be 4x

x+4x=60

5x=60

x=12

4x=4×12

hope it helps :)

5 0

3 years ago

How do I solve this?

Katena32 [7]

We’re the problem bro sorry can’t help you bud

3 0

3 years ago

Mark bought 2 pounds of walnuts for 25.50 Approximately how much will he pay for 7 pounds of walnuts

lara31 [8.8K]

Answer:

89.25

Step-by-step explanation:

2pound of walnut= 25.50

1 pound of walnut= 12.75

7punds of walnut= 89.25

7pounds of walnut= 12.75* 7=89.25

3 0

3 years ago

Solve this equation for x: 2x^2 + 12x - 7 = 0

zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: $2x^2 + 12x - 7 = 0$

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

$2x^2 + 12x - 7+7 = 0+7\\2x^2 + 12x=7$

Step 2: Divide the equation all through by the coefficient of $x^2$ which is 2.

$x^2 + 6x=\frac{7}{2}$

Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

Coefficient of x=6

Divided by 2=3

Square of 3= $3^2$

Therefore, we have:

$x^2 + 6x+3^2=\frac{7}{2}+3^2$

Step 4: Write the Left Hand side in the form $(x+k)^2$

$(x+3)^2=\frac{7}{2}+3^2\\(x+3)^2=12.5\\$

Step 5: Take the square root of both sides and solve for x

$x+3=\pm\sqrt{12.5}\\x=-3\pm \sqrt{12.5}\\x=-3+ \sqrt{12.5}, $ or $x= -3- \sqrt{12.5}\\$x=0.5355 or x=-6.5355$

6 0

3 years ago

The expression 10a+6c gives the cost (in dollars) for a adults and c children to eat at a buffet restaurant. A. The cost for 1 a

Liono4ka [1.6K]

Answer: The total cost is $\$62$ assuming the cost for 1 adult is $\$5$ and the cost for 1 child is $\$2$

Step-by-step explanation:

Assuming the cost for 1 adult is $\$5$ and the cost for 1 child is $\$2$ :

$a=\$5$ and $c=\$2$

Then the expression that gives the total cost $10 a+6c$ is solved as:

$10(\$5)+6(\$2)=\$62$

4 0

3 years ago