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3 years ago

Given that a = 10,

Mathematics

1 answer:

tankabanditka [31]3 years ago

3 0

Since $a = 10$ and $b = 2x + 5$ , we have

$ab=10(2x+5)=20x+50$

So, the equation becomes

$ab = 6x^2 +11x-10 \iff 20x+50= 6x^2 +11x-10 \iff 6x^2-9x-60=0$

The solutions to this equation are 4 and -5/2, so I'm afraid there's a typo in your question.

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The perimeter of a rectangle is 84cm.

Tatiana [17]

Answer:

39 cm

Step-by-step explanation:

The perimeter of a rectangle is given as 2 (w + l) or 2w + 2l, where w and l are the sides.

Let us use <em>w</em> as 3 cm.

The perimeter of the rectangle is 2(3) + 2l = 6 + 2l

6 + 2l = 84 cm

We move the 6 to the left hand side and it goes from positive to negative.

2l = 84 - 6cm

2l = 78 cm

Divide both sides by 2.

l = 39 cm

There you have the answer for side <em>l</em>.

Hope this helps.

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3 years ago

Write a numerical expression for each verbal expression

Reptile [31]

1. The sum of four and nine times three

2. eighteen divided by the sum of two and seven

$\bold{\dfrac{18}{2+7}}$

or: 18÷(2+7), or: 18/(2+7)

3. Ten divided by the product of four and five

$\bold{\dfrac{10}{4\times5}}$

or: 10÷(4×5), or: 10/(4×5)

4. The Difference of eleven and four times five

5. The sum of one and two divided by twenty

$\bold{\dfrac{1+2}{20}}$

or: (1+2)÷20, or: (1+2)/20

6. The sum of two and four and six times eight

7. The sum of twelve and sixteen divided by the sum of three and four

$\bold{\dfrac{12+16}{3+4}}$

or: (12+16)÷(3+4), or: (12+16)/(3+4)

8. The difference of twenty-two and six divided by the sum of five and three

$\bold{\dfrac{22-6}{5+3}}$

or: (22 - 6)÷(5+3), or: (22 - 6)/(5+3)

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4 years ago

SOMEONE PLEASE ANSWER THIS MY ASSIGNMENT IS DUE IN 6MINUTES

Dahasolnce [82]

Answer:

7. No

8. $6.11

Step-by-step explanation:

7. 180 / 3 = 60 350 / 5 = 70

8. 20 / 2 = 10 12.22 / 2 = 6.11

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The answer is D) or acute because it's the definition of an acute triangle.

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