All categories

3 years ago

X² + ___ x + 49 plz answer as soon as possible

Mathematics

2 answers:

kykrilka [37]3 years ago

8 0

Answer:

14

Step-by-step explanation:

(a + b)² = a² + 2ab + b²

x² + _x + 49

a = x

b = 7

2ab = 2×x×7 = 14x => 2b = 14

skelet666 [1.2K]3 years ago

4 0

Answer:

$\Huge \boxed{\mathrm{14}}$

$\rule[225]{225}{2}$

Step-by-step explanation:

Square of a sum formula:

$(a + b)^2 = a^2 + 2ab + b^2$

x² + ___ x + 49

The value of a is x.

The value of b is 7, since 7² = 49.

$x^2 +2(x)(7)+7^2$

$x^2 +14x+49$

The missing coefficient is 14.

$\rule[225]{225}{2}$

You might be interested in

Kit said that 7/8+5/6 is greater than 1 ehoke.Is she correct? Explain.

dlinn [17]

She is correct, first of all, to add 7/8 and 5/6; you must have common denominators so make 7/8 into 42/48 and make 5/6 into 40/48. Then just add them together now, and it will be 82/48. This when you divide 82/48 it will be 1 17/24. So, your answer is, yes, Kit is right.

7 0

4 years ago

Can someone explain please

blondinia [14]

Answer:

$\large\boxed{B.\ \dfrac{7}{4}}$

Step-by-step explanation:

$\dfrac{\Delta y}{\Delta x}=\dfrac{14}{8}=\dfrac{14:2}{8:2}=\dfrac{7}{4}$

3 0

3 years ago

How dou you solve for 6x+4y=24?

lilavasa [31]

You could first solve for y, assuming x is 0, and y = 6. Then solve for x, and that means y = 4.

3 0

4 years ago

A roller coaster begins at 45 feet above ground level. Then it descend 52 feet. Find the height of the coaster after the first d

ioda

Answer:

-7 feet above the ground

Step-by-step explanation:

8 0

4 years ago

A van and a truck both drove from Town A to Town B. The distance

Gala2k [10]

First we need to find out the time it took for the truck to reach town B.

$Speed= \frac{Distance}{Time}$

$40= \frac{200}{T}$
$T=5hours$

Now, because the van left 1.5 hours earlier and reached the destination 2.5 hours before, it took 1 hour less the the truck to arrive.

$5hours-1hour=4hours$ which is the time it took for the van to arrive.

Now we use the speed equation again to work out speed.

$Speed= \frac{200}{4}$

$Speed=50mph$ = speed of van

Hope this helped :)

4 0

4 years ago