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3 years ago

(a) Simplify 3a + 7b - a + 4b

Mathematics

1 answer:

scZoUnD [109]3 years ago

4 0

Answer:

2a+11b

Step-by-step explanation:

Need like terms!

3a-a

=2a

7b+4b

=11b

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How do i find the unknown side length of a triangle?

Cerrena [4.2K]

By using Pythagoreans Theorem: a^2 + b^2 = c^2

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4 years ago

Read 2 more answers

Which expression is NOT equivalent to a · c · 5 · 5?<br> 10ac <br> 25ac <br> 25ca

arsen [322]

Answer:

10ac

Step-by-step explanation:

We have been given the expression a · c · 5 · 5

We can multiply 5 with 5 and get 25.

Thus, the expression becomes

a · c · 5 · 5= ac25

We can rewrite the expression using commutative property

25ac = 25ca

Therefore, the given expression is equivalent to 25ac and 25ca.

Hence, 10ac is not the correct form.

First option is correct.

6 0

3 years ago

A rectangle and a square have the same perimeter. the rectangle is of length 6cm and has an area of 48cm², find the length of th

EleoNora [17]

<em>The length of the square that has the same perimeter as the rectangle is of length 6cm and area of 48cm² is 7cm</em>

<h2>Explanation:</h2>

Let's call:

$A_{s}:Area \ of \ square \\ \\ A_{r}:Area \ of \ rectangle \\ \\ P_{s}:Perimeter \ of \ square \\ \\ P_{r}:Perimeter \ of \ rectangle$

From the question, we know that:

<em>A rectangle and a square have the same perimeter.</em>

So:

$P_{s}=P_{r}$

Moreover:

<em>The rectangle is of length 6cm and has an area of 48cm²</em>

Accordingly:

$For \ Rectangle: \\ \\ L:Length \\ W:Width \\ \\ A_{r}=L\times W \\ \\ 48=6W \\ \\ W=8$

Also:

$A_{s}=s^2 \\ \\ S:Side \ of \ square$

From the statement of perimeters:

$P_{s}=P_{r} \\ \\ \\ But: \\ \\ P_{s}=4s \\ \\ P_{r}=2W+2L \\ \\ \\ Then: \\ \\ 4s=2W+2L \\ \\ \\ But: \ W=8 \ and \ L=6 \\ \\ 4s=2(8)+2(6) \\ \\ 4s=16+12 \\ \\ 4s=28 \\ \\ \boxed{s=7cm}$

Finally, <em>the length of the square that has the same perimeter as the rectangle is of length 6cm and area of 48cm² is 7cm</em>

<h2>Learn more:</h2>

Perimeter: brainly.com/question/9969486

#LearnWithBrainly

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3 years ago

Bill bought a table on sale for $630. This price was 72% of the original price.

allochka39001 [22]

Answer:

The original price was $875.

Step-by-step explanation:

a = p * w

630 = 72% * w

630 / 0.72 = $875

$875 should be the original price, I hope this helps!

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3 years ago

3. If the mZLKI - 174º and KR bisects LLKI, then find the mLLKR.

lisov135 [29]

I don’t know sorry byeee

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3 years ago