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3 years ago

Please help asap please

Mathematics

2 answers:

sdas [7]3 years ago

6 0

The answer is 76. I know because i took the test

sleet_krkn [62]3 years ago

4 0

Answer:

A. 16

Step-by-step explanation:

$x^{3} + x^{2} - x(4)\\= x^{3} +x^{2} + (4x^{2})\\= 3x{3} + 2x^{2} + 4x\\= 9x + 5x + 4x\\= 12x + 4x\\\\x = 16$

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Evaluate 49 – 12 when g = 5.

kozerog [31]

Answer:

where is the g? ill try to answer it ok. 49 - 12 = 37 * 5 = 185?

Step-by-step explanation:

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A player on a school baseball team reaches first base 7/10 of the time he is at bat. Out of 50 times at bat, how many times woul

riadik2000 [5.3K]

Answer:

Step-by-step explanation:

You can find it by multiplying the decimal of the fraction (In this case it's 0.7) by however many times it's happening (50).

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If the ratio of green to yellow marbles is 2:3, what percent of the marbles are yellow?

Keith_Richards [23]

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3 years ago

Find the x-intercept of the line 5× - y =10

LenKa [72]

Answer:

(2,0)

Step-by-step explanation:

To find the x intercept, set y =0 and solve for x

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4 0

4 years ago

Find the lengths of the sides of the triangle PQR. P(2, −3, −4), Q(8, 0, 2), R(11, −6, −4) |PQ| = Incorrect: Your answer is inco

Aloiza [94]

Answer:

the length PQ is 9 units,the length QR is 9 units,the length PR is 9.48 units,the triangle is not a right triangle,this is a isosceles triangle

Step-by-step explanation:

Hello, I think I can help you with this

If you know two points, the distance between then its given by:

$P1(x_{1},y_{1},z_{1} ) \\P2(x_{2},y_{2},z_{2})\\\\d=\sqrt{(x_{2}-x_{1} )^{2} +(y_{2}-y_{1} )^{2}+(z_{2}-z_{1} )^{2} }$

Step 1

use the formula to find the length PQ

Let

P1=P=P(2, −3, −4)

P2=Q=Q(8, 0, 2)

$d=\sqrt{(8-2)^{2} +(0-(-3))^{2}+(2-(-4))^{2}} \\ d=\sqrt{(6)^{2} +(3)^{2}+(6 )^{2}}} \\d=\sqrt{36+9+36}\\d=\sqrt{81} \\d=9\\$

the length PQ is 9 units

Step 2

use the formula to find the length QR

Let

P1=Q=Q(8, 0, 2)

P2=R= R(11, −6, −4)

$d=\sqrt{(11-8)^{2} +(6-0))^{2}+(-4-2 )^{2}} \\\\\\d=\sqrt{(3)^{2} +(6)^{2}+(-6 )^{2}}} \\d=\sqrt{9+36+36}\\d=\sqrt{81} \\d=9\\$

the length QR is 9 units

Step 3

use the formula to find the length PR

Let

P1=P(2, −3, −4)

P2=R= R(11, −6, −4)

$d=\sqrt{(11-2)^{2} +(-6-(-3)))^{2}+(-4-4 )^{2}} \\\\\\d=\sqrt{(9)^{2} +(-6+3)^{2}+(-4-(-4) )^{2}}} \\d=\sqrt{81+9+0}\\d=\sqrt{90} \\d=9.48\\$

the length PR is 9.48 units

Step 4

is it a right triangle?

you can check this by using:

$side^{2} +side^{2}=hypotenuse ^{2}$

Let

side 1=side 2= 9

hypotenuse = 9.48

Put the values into the equation

$9^{2} +9^{2} =9.48^{2}\\ 81+81=90\\162=90,false$

Hence, the triangle is not a right triangle

Step 5

is it an isosceles triangle?

In geometry, an isosceles triangle is a type of triangle that has two sides of equal length.

Now side PQ=QR, so this is a isosceles triangle

Have a great day

3 0

3 years ago