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2 years ago

What is the value of the expression 10(6 + 5)² when b = 3?

Mathematics

1 answer:

SashulF [63]2 years ago

3 0

10(3+5)^2

10(8)^2

10(64)

=640

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If Ray earns $120 for 15 hours of work how much will he earn for 20 hours of work at the same rate

Free_Kalibri [48]

Find his rate:
120 / 15 = $8 per hour
Multiply the rate by hours:
$8 x 20 hours = $160
He will earn $160

8 0

2 years ago

What’s the median of these two numbers ? 13 and 13

ale4655 [162]

median: The number that occurs in the middle after arranging in ascending order of magnitude

;13 13

since both appeared in the middle,you add it and divide by 2

13+13/2

26/2

;The median is 13

8 0

3 years ago

Which lines are parellele

natali 33 [55]

Line 1 and Line 4 are parallel lines

Solution:

General equation of a line:

y = mx + c

where m is the slope and c is the y-intercept of the line.

To find the slope of each line:

Line 1: $y=-\frac{3}{4} x-6$

Slope $(m_1)=-\frac{3}{4}$

Line 2: $y-7=-4(x+9)$

$y-7=-4x-36$

Add 7 on both sides, we get

$y=-4x-29$

Slope $(m_2)=-4$

Line 3: $y=-2 x+6$

Slope $(m_3)=-2$

Line 4: $x+\frac{4}{3} y=-5$

Subtract x from both sides, we get

$\frac{4}{3} y=-x-5$

Multiply by $\frac{3}{4}$ on both sides, we get

$y=-\frac{3}{4}x-\frac{15}{4}$

Slope $(m_4)=-\frac{3}{4}$

Two lines are parallel, if their slopes are equal.

From the above slopes,

$m_1=m_4$

Therefore Line 1 and Line 4 are parallel lines.

3 0

2 years ago

Solve. 3(x+1)-2x=-6

RideAnS [48]

D.) x = - 9

C.) x = 0

Hope that helps, Good luck! (:

4 0

3 years ago

Solve the quadratic equation below for the exact values of x: 4x^2-5=75

grandymaker [24]

Step-by-step explanation:

$4 {x}^{2} - 5 = 75 \\ 4 {x}^{2} = 75 + 5 \\ 4 {x}^{2} = 80 \\ {x}^{2} = \frac{80}{4} \\ {x}^{2} = 20 \\ x = \pm \sqrt{20} \\ x = \pm 2 \sqrt{5}$

6 0

3 years ago