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3 years ago

I really need help with these questions. What will these word problems look like?

1 answer:

5 0

A. The perimeter, P, of a rectangle is the sum of twice the length and twice the width.

answer

1. P = 2(l+w) units
2. P = 2(5)+2(9) units
4. P = (l+l)+(w+w) units

B. The area, A, of a triangle is one-half the product of the triangle's base and height.

answer

2. A = 1/2(12)(5)

3. A = 1/2(b*h)

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A piece of ribbon is cut into 3 different pieces A, B and C. The ratio of the length of A to the length of B is 3 : 4. The ratio

dusya [7]

Answer:

Step-by-step explanation:

$\frac{A}{B}:\frac{3}{4}$ and $\frac{B}{C}: \frac{8}{9}$ and we are told that C is 6cm longer than A. That means that C = A + 6.

We are going to cross multiply each one of those ratios. The first one gives us

4A = 3B and the second one gives us

9B = 8C. But since C = A + 6, then

9B = 8(A + 6) and

9B = 8A + 48 and

Now we will solve the first equation above for A:

If 4A = 3B, then

$A=\frac{3}{4}B$ and will use that as a sub for A in the second equation:

$9B=8(\frac{3}{4}B)+48$ and

9B = 6B + 48 and

3B = 48 so

B = 16.

Now that we know B, we can use it to solve for A:

4A = 3(16) and

4A = 48 so

A = 12.

Then we can use that all the way back in the expression we set up for C:

C = A + 6 so

C = 12 + 6 so

C = 18

12 + 16 + 18 is the length of the string: 46cm

3 0

3 years ago

Solve the system of equations. \begin{aligned} & -5x+13y = -7 \\\\ & 5x+4y=24 \end{aligned} −5x+13y=−7 5x+4y=24 x= e

riadik2000 [5.3K]

Answer:

The solution of the given equations

x =4 , y = 1

Step-by-step explanation:

Explanation:-

Step(l):-

Given the system of equations -5x+13y = -7 ..(l)

5x+4y=24 ..(ll)

Step(ll)

Adding (l) and (ll) equations and cancelling '5x' terms we get

13y+4y = -7 +24

17y = 17

dividing '17' on both sides, we get

y=1

Step(lll):-

Substitute y=1 in equation (l) , we get

-5x+13y = -7

-5x + 13(1) = -7

subtracting '13' on both sides, we get

-5x +13 -13= -7 -13

-5x = -20

Dividing '-5' on both sides, we get

$x = \frac{-20}{-5}$

x = 4

Conclusion:-

The solution of the given equations

x =4 , y = 1

7 0

3 years ago

Please help I need help with the middle question!!!!

Ivahew [28]

I have not seen this before hopefully some can help u for the answer like this answer is

6 0

3 years ago

Describe how to factor quadratics.

Feliz [49]

Answer:

Step 1:

Write the equation in the correct form. To be in the correct form, you must remove all parentheses from each side of the equation by distributing, combine all like terms, and finally set the equation equal to zero with the terms written in descending order.

Step 2:

Use a factoring strategies to factor the problem.

Step 3:

Use the Zero Product Property and set each factor containing a variable equal to zero.

Step 4:

Solve each factor that was set equal to zero by getting the x on one side and the answer on the other side

4 0

3 years ago

The difference between two numbers, a and b, is 21. The difference of 5 times a and two times b is 18

aleksandrvk [35]

Answer:

No question

Step-by-step explanation:

If you want an answer, you must provide a question.

3 0

3 years ago