All categories

3 years ago

Alex is 22 years older than Lana. Four years ago Lana’s age was one-half of Alex’s current age. How old was Alex four years ago?

Mathematics

2 answers:

katen-ka-za [31]3 years ago

7 0

Answer:

Step-by-step explanation

22 divided by 2 is 11

it says four years ago so add 11 and 4 and that equals 15

she is 15 right now. then add 22 which is 37 and subtract 4 which your answer would be 33

icang [17]3 years ago

3 0

22 divided by 2 is 11

it says four years ago so add 11 and 4 and that equals 15

she is 15 right now. then add 22 which is 37 and subtract 4 which your answer would be 33

33 is the answer.

You might be interested in

Why did you multiply 15 by 3?

navik [9.2K]

To get an answer which is....45

8 0

3 years ago

Read 2 more answers

Solve: x + y = 7 3x - 2y = 11 By using Substituting method.

Salsk061 [2.6K]

$\large\underline{\sf{Solution-}}$

$\sf \longmapsto x + y = 7 \: \: - - - (i)$

$\sf \longmapsto 3x - 2y = 11 \: \: - - - (ii)$

By first equation,

$\sf \longmapsto x + y = 7$

$\sf \longmapsto x = 7 - y$

Now, we can find the original value of y.

$\sf \longmapsto 3x - 2y = 11$

$\sf \longmapsto 3(7 - y) - 2y = 11$

$\sf \longmapsto 21 - 3y - 2y = 11$

$\sf \longmapsto 21 - 5y = 11$

$\sf \longmapsto - 5y = 11 - 21$

$\sf \longmapsto - 5y = - 10$

$\sf \longmapsto y = \dfrac{ - 10}{ - 5}$

$\sf \longmapsto y = 2$

Now, we can find the original value of x.

$\sf \longmapsto x + y = 7$

$\sf \longmapsto x + 2 = 7$

$\sf \longmapsto x = 7 - 2$

$\sf \longmapsto x = 5$

Therefore, the values of x and y are 5 and 2 respectively.

8 0

3 years ago

Read 2 more answers

Given that the measure of ∠x is 90°, and the measure of ∠y is 53°, find the measure of ∠z.

jeka94

To find the answer we can use the angles sum of triangle which is 180° to find ∠z by deducting the other two angles from 180°:

180°-53°-90°
=37°

Therefore ∠z=37°.

Hope it helps!

6 0

3 years ago

Read 2 more answers

A triangle has two sides of lengths 4 and 15.What value could the length of the third side be? Check all that apply.. A:12 B:13

galina1969 [7]

If a, b and c are the lengths of the sides of a triangle then

if a ≤ b ≤ c, then a + b > c.

A: 4, 12, 15

4 + 12 = 16 > 15 CORRECT :)

B: 4, 13, 15

4 + 13 = 17 > 15 CORRECT :)

C: 4, 4, 15

4 + 4 = 8 < 15 INCORRECT :(

D: 4, 15, 15

4 + 15 = 19 > 15 CORRECT :)

E: 4, 11, 15

4 + 11 = 15 INCORRECT :(

F: 4, 15, 19

4 + 15 = 19 INCORRECT :(

<h3>Answer: A: 12, B: 13, D; 15</h3>

3 0

3 years ago

Find the m and b of the table

kykrilka [37]

9514 1404 393

Answer:

m = 1/2

b = -7

Step-by-step explanation:

The formulas for these can be used.

m = (y2 -y1)/(x2 -x1) . . . . . . . . . formula for slope given 2 points

m = (-9 -(-11))/(-4-(-8)) = 2/4

m = 1/2

b = y1 -m·x1 . . . . . . . . . . . . formula for y-intercept given slope and point

b = -11 -(1/2)(-8) = -11 +4

b = -7

6 0

3 years ago