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3 years ago

Solve for a. – 2a+5≤7 eazy 20 points

Mathematics

2 answers:

juin [17]3 years ago

6 0

Answer:

a+5=3.5

or a= -1.5

Step-by-step explanation:

2a+5≤7

now divide 2 into 7

then that 7 would be 3.5 so

a+5=3.5

and a would equal

-1.5

Lena [83]3 years ago

4 0

Answer:

Step-by-step explanation:

What minus 5 equals 7? That's right, 12. what times 2 equals 12? 6

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a purse contains ₹550 notes of denomination of ₹10 and ₹50 if the number of rupees 50 notes is one less than of ₹10 notes then f

12345 [234]

Answer:

Step-by-step explanation:

Let x represent the number of ₹50 notes. Then the number of ₹10 notes is (x+1) and the total value of all notes is ...

₹50·x + ₹10·(x+1) = ₹550

₹60·x = ₹540 . . . . . . . . . . . . subtract ₹10 and collect terms

x = 9 . . . . . . . . . . . . . . divide by ₹60

The number of ₹50 notes is 9.

7 0

2 years ago

Read 2 more answers

Find BC if segment AD is an altitude of triangle ABC PLEASE HELP

Vedmedyk [2.9K]

Answer:

BC = 96

Step-by-step explanation:

Since AD is an altitude, then ∠ ADC = 90° , thus

4x + 10 = 90 ( subtract 10 from both sides )

4x = 80 ( divide both sides by 4 )

x = 20

Thus

BC = BD + DC

= 2x + 3x - 4

= 5x - 4

= 5(20) - 4 = 100 - 4 = 96

3 0

3 years ago

Make n the subject of the formula in the equation:t=2π√q/pn

GarryVolchara [31]

Answer: n = 4π(sq)q/(t(sq)*p)

Step-by-step explanation: please see attachment for clearer details. Thanks!

5 0

3 years ago

find the equation of the perpendicular bisector of segment ab with endpoints a=2,2 and b=-4,6 if the perpendicular bisector inte

aleksklad [387]

Equation of perpendicular bisector is , $y=\frac{3}{2} x+\frac{11}{2}$

Length of both pa and pb are $\sqrt{\frac{65}{4} }$ unit.

Slope of segment ab is, $\frac{6-2}{-4-2} =-\frac{2}{3}$

So, slope of perpendicular bisector will be, negative of reciprocal of slope of segment ab.

Therefore, slope of perpendicular bisector is, $\frac{3}{2}$

Since, perpendicular bisector passes through the mid point of segment ab.

So, coordinate of mid point of segment ab is,

$(\frac{2-4}{2},\frac{2+6}{2} )=(-1,4)$

Thus, perpendicular bisector of ab passing through (- 1, 4) and have slope 3/2.

So, equation of angle bisector is,

$y=\frac{3}{2} x+\frac{11}{2}$

Since, the perpendicular bisector intersects the y-axis at point p

So, coordinate of point p is (0, 11/2)

By applying distance formula,

$pa=\sqrt{(2-0)^{2}+(2-11/2)^{2} }\\\\ =\sqrt{4+\frac{49}{4} }\\\\ =\sqrt{\frac{65}{4} }$

$pb=\sqrt{(-4-0)^{2}+(6-11/2)^{2} }\\\\ =\sqrt{16+\frac{1}{4} }\\\\ =\sqrt{\frac{65}{4} }$

Learn more,

https://brainly.in/question/31510165

8 0

3 years ago

Simplify 13 over the quantity of negative 3 plus 2i.

QveST [7]

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Multiply by

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to make the denominator of

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real.

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Combine.

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Expand

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using the FOIL Method.

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⋅

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Simplify.

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Simplify each term.

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Reduce the expression by cancelling the common factors.

Tap for more steps...

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7 0

3 years ago