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4 years ago

Find the area of the triangle or quadrilateral.

Mathematics

1 answer:

Alex4 years ago

4 0

Answer:

= 42 in^2

Step-by-step explanation:

This figure is a trapezoid

The area of a trapezoid is given by

A = 1/2 (b1+b2) h where b1 and b2 are the top and bottom bases and h is the height

A = 1/2( 13+8)* 4

A = 1/2(21)*4

= 42 in^2

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Help I dont understand

Rudik [331]

Hi mate
So u see the numbers on the cone the 7 and 9 it tells u that U have to round the nearest tenth and u have to find the answer. U answer is 64.0

4 0

3 years ago

Find the solution(s) for x in the equation below. x^2 + 10x + 21= 0

Law Incorporation [45]

The solutions for ‘x’ in the given equation are – 3 and - 7

<u>Step-by-step explanation:</u>

Given equation:

$x^{2} + 10 x + 21 = 0$

To find the ‘x’ value, try to factor, because in this case it works, it's fast. By using factor method, we get

(x + 3) (x + 7) = 0 (adding both value we get 10 and multiply as 21 as in equation and check with signs also while factoring)

x = - 3, -7

Verify above values by multiply both terms,

(x + 3) (x + 7) = 0

$x^{2} + 7 x + 3 x + 21 = 0$

$x^{2} + 10 x + 21 = 0$ (so values obtained from factor method are correct)

Or, can use quadratic formula, for $a x^{2} + b x + c=0$ , the solutions are given by:

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

In the given equation, a = 1, b = 10, c = 21, apply these in above formula

$x=\frac{-10 \pm \sqrt{10^{2}-(4 \times 1 \times 21)}}{2(1)}=\frac{-10 \pm \sqrt{100-84}}{2}$

$x=\frac{-10 \pm \sqrt{16}}{2}=\frac{-10 \pm 4}{2}$

So,

When $x=\frac{-10+4}{2}=\frac{-6}{2}=-3$

When $x=\frac{-10-4}{2}=\frac{-14}{2}=-7$

Hence, the values for ‘x’ are - 3 and - 7

7 0

3 years ago

Which expression are differences of squares <br> Select each correct answer

Gennadij [26K]

Answer:

options are 3 and 4

Step-by-step explanation:

The difference of squares is defined as In option 1,

It can be written as

It is the sum of squares, therefore the option 1 is incorrect.

In option 2,

The number 40 is not a complete square of any number, therefore option 2 is incorrect.

In option 3,

It can be rewritten as

It is the difference of squares, therefore option 3 is correct.

In option 4,

It can be rewritten as

It is the difference of squares, therefore option 4 is correct.

have a good Day!

4 0

3 years ago

Which is an equation in point-slope form for the line that passes through the points (−1,4) and (3,−4) ?

Kryger [21]

Answer:

D. y + 4 = 2(x - 3) is your answer.

Step-by-step explanation:

What you have to do first is find the slope.

4 and -4 are y's. -1 and 3 are x's.

-4 - 4 / -1 - 3 = 2.

Your slope is 2.

D. y + 4 = 2(x - 3) is your answer.

3 0

4 years ago

8(12+a) i need it done by today!!!

s344n2d4d5 [400]

Answer: 8+96

Step-by-step explanation: if u r lookin for the solution that’s the answer

3 0

3 years ago

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