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3 years ago

X2+7x-8 please factor

Mathematics

1 answer:

vova2212 [387]3 years ago

8 0

$x^2+7x-8=x^2+8x-x-8=x(x+8)-1(x+8)=(x+8)(x-1)$

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Can you help me find the measure of each angle? Diagram attached

never [62]

Answer:

5x = 100°

4x = 80°

Step-by-step explanation:

We are given a diagram with a straight line AC being intersected by another line BD and we are to find the two mentioned angles.

We know that the two angles (5x° and 4x°) are supplementary so their sum would be equal to 180°.

So we can write it as:

$5x+4x=180$

$9x=180$

$x=\frac{180}{90}$

$x=20$

Finding the measure of both the angles:

$5x = 5(20) =$ 100°

$4x = 4(20) =$ 80°

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3 years ago

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On Monday, a museum had 150 visitors. On Tuesday, its had 260 visitors.

steposvetlana [31]

Answer:

Step-by-step explanation:

%change=100(final-initial)/initial

%change=100(260-150)/150

%change=220/3%. (roughly 73.33%)

260(1+220/300)

260(520/300)

451 (rounded to nearest whole person)

6 0

3 years ago

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What is the x-coordinate of the solution of the system? x+y+3 4x-y=-38

steposvetlana [31]

Note: I am assuming the first equation is:

x+y = 3

Answer:

The solution to the system of equations is:

(x, y) = (-2, 36)

Therefore, the x-coordinate of the solution of the system

x = -2

Step-by-step explanation:

Given the system of equations

$\begin{bmatrix}x+y=34\\ x-y=-38\end{bmatrix}$

subtracting the equations

$x-y=-38$

$-$

$\underline{x+y=34}$

$-2y=-72$

solve -2y for y

$-2y=-72$

Divide both sides by -2

$\frac{-2y}{-2}=\frac{-72}{-2}$

$y=36$

For x+y=34 plug in y = 36

$x+36=34$

Subtract 36 from both sides

$x+36-36=34-36$

Simplify

$x=-2$

Thus, the solution to the system of equations is:

(x, y) = (-2, 36)

Therefore, the x-coordinate of the solution of the system

x = -2

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3 years ago

The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.25 before the discount, and

soldi70 [24.7K]

Answer:

$82.16

Step-by-step explanation:

78.25 * .20 = 15.65 as a tip,

78.25 *.15 = 11.74 as the discount, subtract from initial value:

78.25 - 11.74 = 66.51

then add the tip: 15.65 + 66.51 = $82.16

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3 years ago

Cual es el valor de verdad de: El rio magdalena es el rio más largo de colombia

allsm [11]

Yes, it is the longest river

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3 years ago