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3 years ago

I NEED HELP ASAP PLEASEEEEEE

Mathematics

2 answers:

sweet-ann [11.9K]3 years ago

3 0

Step-by-step explanation:

The answer is 33 because

If Mathew is 13 then twice is 13 x 2 = 26

Then 7 years older so 26 + 7 = 33

vekshin13 years ago

3 0

Answer:

I think the answer is A.

Step-by-step explanation:

I would write the equation using x as Mathew's sisters age so his sister's age is 2x + 7 = 13 and then solve for x. Subtract 7 from both sides which leaves

2x = 6, divide both sides by 2 which is 3. Hope that helps.

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What is. 3/4x - 2/3x - 4 = 1/6x - 7 I give Brainliest!

Lady bird [3.3K]

Answer:

x = 36

Step-by-step explanation:

(3/4)*x-((2/3)*x)-4 = (1/6)*x-7 // - (1/6)*x-7

(3/4)*x-((2/3)*x)-((1/6)*x)-4+7 = 0

(3/4)*x+(-2/3)*x+(-1/6)*x-4+7 = 0

3-1/12*x = 0 // - 3

-1/12*x = -3 // : -1/12

x = -3/(-1/12)

x = 36

4 0

2 years ago

PLZ HELP ASAP NEEEEEEDDDDD HELP ASAP

Nataliya [291]

Answer:

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

A 10ft by 20ft rectangular swimming pool is surrounded by a walkway of uniform width. If the total area of the walkway is 216ft^

Dmitry [639]

check the picture below.

so, we know the dimensions of the pool, is a 20x10, so its area is simply 200 ft², and we know the walkway is 216 ft², so the whole thing, including pool and walkway is really 200 + 216 ft².

now, as you see in the picture, the dimensions for the combined area is 20+2x and 10+2x, since the walkway is "x" long, therefore,

$\bf \stackrel{length}{(20+2x)}\stackrel{width}{(10+2x)}=200+216\implies \stackrel{FOIL}{4x^2+60x+200}=200+216 \\\\\\ 4x^2+60x=216\implies \stackrel{dividing~by~4}{x^2+15x=54} \\\\\\ x^2+15x-54=0\implies (x+18)(x-3)=0\implies x= \begin{cases} -18\\ \boxed{3} \end{cases}$

notice, it cannot be -18, since is a positive length unit.

5 0

2 years ago

Read 2 more answers

Billie solved the equation below by completing the square, but she got the incorrect solution. In which step did Billie first ma

Tanzania [10]

Answer:

step 2

Step-by-step explanation:

we have

$x^{2} +10x-49=0$ ---> given problem

step 1

Move the constant to the right side

$x^{2} +10x=49$

the step 1 is correct

step 2

Complete the square

$x^{2} +10x+5^2=49+5^2$

$x^{2} +10x+5^2=74$

The step 2 is not correct

step 3

Rewrite as perfect squares

$(x+5)^{2}=74$

step 4

take square root both sides

$x+5=\pm\sqrt{74}$

step 5

Find the values of x

$x=-5\pm\sqrt{74}$

$x=-5+\sqrt{74}$

$x=-5-\sqrt{74}$

5 0

3 years ago

At the movie theatre, child admission is $6.40 and adult admission is $9.70. On Monday, 155 tickets were sold for a total sales

Molodets [167]

Less than or equal to 121 adult tickets.

You would do 1180.10/9.70

Which equals 121

Since we don't know how many children tickets were, sold it could be less than or equal to 121.

3 0

2 years ago