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3 years ago

How do i give brainliest? also please solve the problem :)

Mathematics

2 answers:

WITCHER [35]3 years ago

8 0

Answer:

When there are 2 answers there will be a crown you can click and that will give brainlest

Step-by-step explanation:

a + b + c

8 + 10 + 5

= 11.5 inches

Area = √s(s-a)(s-b)(s-c)

= √11.5×(11.5 - 8)×(11.5 - 10)×(11.5 - 5)

= 19.810035335658 inches

aev [14]3 years ago

4 0

Answer:

the answer is 19.81 inches

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0.001350

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3 years ago

John says that the number Y is equal to five more than 15 times X which of the following equation could be used to find the valu

evablogger [386]

Answer:

Step-by-step explanation:

Y=5+15X

8 0

4 years ago

Cynthia besch wants to buy a rug for a room that is 23ft wide and 26ft long. She wants t ok leave a uniform strip of floor aroun

Lostsunrise [7]

Answer:

Dimension of rug is $(15\times 18)\ ft$

Step-by-step explanation:

Given: Area of rug= 270 ft²

Cynthia besch wants to buy a rug for a room that is 23ft wide and 26ft long.

Let´s assume the uniform strip size of floor around rug be "x".

As given, Cynthia wants to leave a uniform strip of floor around the rug.

∴ Rug dimension will be $(23-2x)\times (26-2x)$

We know, area of rectangle= $width\times length$

Forming an equation for area of rug.

⇒ $270= (23-2x)\times (26-2x)$

Now solving the equation to find the dimension of rug.

$270= (23-2x)\times (26-2x)$

Using distributive property of multiplication.

⇒ $270= 598-46x-52x+4x^{2}$

⇒ $598-98x+4x^{2}= 270$

Subtracting both side by 270

⇒ $4x^{2}-98x+328= 0$

using quadratic formula to solve the equation.

⇒ Formula: $\frac{-b\pm \sqrt{b^{2}-4(ac) } }{2a}$

∴ In the expression , we have a= 4, b= -98 and c= 328.

Now, subtituting the value in the formula.

= $\frac{-(-98)\pm \sqrt{-98^{2}-4(4\times 328) } }{2\times 4}$

= $\frac{98\pm \sqrt{9604-4(1312) } }{8}$

Opening parenthesis.

= $\frac{98\pm \sqrt{9604-5248 } }{8}$

= \frac{98\pm \sqrt{4356}}{8}

We know 66²=4356 and √a²=a or -a

= $\frac{98\pm 66}{8}$

= $\frac{98+66}{8}\ or \ \frac{98-66}{8}$

= $20.5 \ or\ 4$

∴ Value of x will be either 20.5 ft or 4 ft

Ignoring decimal value, therefore taking value of x is 4 ft

Subtituting the value of x to find the dimension of rug.

Width of rug= $(23-2x)$

⇒ Width of rug= $23- 2\times 4$

⇒ Width of rug= $23-8= 15\ ft$

Next, Length of rug= $(26-2x)$

⇒ Length of rug= $(26-2\times 4)$

⇒ Length of rug= $26-8= 18\ ft$

Hence, dimension of rug is $(15\times 18)\ ft$

6 0

3 years ago

Which is the equation of the graph

oksano4ka [1.4K]

I'm guessing the last value you have down there that got cut off was the one we want. We need to set up the general form of the absolute value equation and then solve it for a: $y=a[x-h]+k$ . I have no absolute value symbols so I just used brackets. We have a vertex (h, k) of (0, 0) and I picked a point on the graph to use as my x and y coordinates (4, 3). Let's fill in the equation now: $0=a[0-4]+3$ . We will subtract 3 from both sides leaving -3 = a[-4]. The absolute value of -4 is 4 so now we have -3 = 4a. Divide by 4 to solve for a. $a=- \frac{3}{4}$ . So our equation is $y=- \frac{3}{4}[x]$

8 0

3 years ago

HELLP!!!!!!!!!! I’ll mark you the brainiest

anastassius [24]

Answer:

n ≥ -3

Step-by-step explanation:

So, divide -27 by 9n and the answer to that is -3, because when you're dividing a negative number and a positive, the answer would always be negative.

This sign : ≥ means greater than or equal to, and because we are solving for n, -3 is equal to n.

8 0

3 years ago

Read 2 more answers