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3 years ago

BRAINLIEST AND 20 POINTS

Mathematics

2 answers:

Andrew [12]3 years ago

4 0

The answer is the third one :)

Ne4ueva [31]3 years ago

3 0

Answer:

Step-by-step explanation:

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<img src="https://tex.z-dn.net/?f=%20-%208y%20%5Cgeqslant%2056" id="TexFormula1" title=" - 8y \geqslant 56" alt=" - 8y \geqslant

SCORPION-xisa [38]

Answer:

y ≤-7

Step-by-step explanation:

-8y ≥56

Divide each side by -8. Remember to flip the inequality

-8y/-8 ≤56/-8

y ≤-7

8 0

2 years ago

Can someone help me with this? thank you!

ExtremeBDS [4]

Answer:

242 sq. cm.

Step-by-step explanation:

Surface Area

2(LH + BH + LB)
2(10 × 3 + 7 × 3 + 10 × 7)
2(30 + 21 + 70)
2(121)
242 sq. cm.

3 0

1 year ago

The path of a volley ball thrown over a net is modeled with the function A(x) = -0.02x2 + 0.6x + 5, where x is

LiRa [457]

Answer:

The ball travel horizontally 37 feet before it hits the ground

Step-by-step explanation:

we have

$A(x)=-0.02x^2+0.6x+5$

where

x ----> is the horizontal distance in feet

A ---> is the altitude of the ball, in feet.

we know that

When the ball hit the ground, the altitude of the ball is equal to zero

For A(x)=0

$-0.02x^2+0.6x+5=0$

solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$-0.02x^2+0.6x+5=0$

$a=-0.02\\b=0.6\\c=5$

substitute in the formula

$x=\frac{-0.6\pm\sqrt{0.6^{2}-4(-0.02)(5)}} {2(-0.02)}$

$x=\frac{-0.6\pm\sqrt{0.76}} {-0.04}$

$x=\frac{-0.6\pm0.87} {-0.04}$

$x=\frac{-0.6+0.87} {-0.04}=-6.75$

$x=\frac{-0.6-0.87} {-0.04}=36.75$

therefore

The ball travel horizontally 37 feet before it hits the ground

3 0

2 years ago

Please solve the question.

Otrada [13]

Answer:

Step-by-step explanation:

(7b-4) + (-2b+a+1)

= 7b - 4 - 2b + a + 1

=7b - 2b + a - 4 + 1

=5b + a - 3

5 0

2 years ago

Help i got a 50% and i need to redo it plz and i got a D soo please help its due Thursday

Alchen [17]

I'm not very sure about it... but if it rains 1 day out of a 5day week (not counting weekends) it would be a total of 4days that they ride there bike.. So I could not help u more hope this info helps u a little bit

7 0

2 years ago