Dana has only nickels in her hand,ajah has exactly the same number of dimes and no other coins.together they have a total of 90 cents how many coins is each person holding ?
5N + 10D = 90
N = D
5N + 10N = 90
15N = 90
N = 6
& D = 6
check answer
Does (6 • 5¢) + (6 • 10¢) = 90¢ ?
30¢ + 60¢ = 90¢
90¢ = 90¢ True
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three numbers multiply to give the number 288. two of them are -3 and 12. what's the third number?
x = 288 / (–3 • 12)
x = 288 / –36
x = – 8
1+2−3+4−5+6=7 I have to put one-left and one-right parentheses but I don´t know where
1 + 2 − 3 + 4 − 5 + 6 = 7
1 + 2 − ( 3 + 4 − 5 ) + 6 = 7
1 + 2 − ( 2 ) + 6 = 7
1 + 2 – 2 + 6 = 7
1 + 6 = 7
by how many g is 5 times 250 g less than 2 kg?
2K g = 2000 g
5 • 250 g = 1250 g
subtract –> 750 g
What is the perimeter of the playground?
X / 400 = cotan (53o)
X / 400 = 0.75355
X = 400 • 0.75355
X = 301.42
P = (2)(301.42) + (2)(400)
P = 602.84 + 800
P = 1402.84 rounds to 1403 ft
express ln2.25 in terms of 3 and 4
2.25 = 3 – (3/4)
The measure of the interior angle of a regular polygon is 157.5. How many sides does the polygon have?
180.0 – 157.5 = 22.5 measure of one exterior angle
360.0 / 22.5 = 16 number of exterior angles
16 also the number of sides
Use the sine function to find A if a=32 cm and c=51 cm in the triangle ABC.
sin(A) = a / c
sin(A) = 32 / 51
sin(A) = 0.62745
A = sin–1 (0.62745)
A = 38.86o
What is the missing numbers? Something9 times something9 = 2001
2001 / 19 = 105.3 Nope, that's not it. We want an integer.
2001 / 29 = 69.0
29 x 69 = 2001
imani spent half her weekly allowance playing mini golf.
to earn more money her parents let her wash the car for 4$.
what is her weekly allowance if she ended with 12$
(1/2) A + 4 = 12
(1/2) A = 12 – 4
(1/2) A = 8
A = 16
if a right angel triangel has one side 68cm and a hypotnuse of 95cm. whta is the third side?
c2 = a2 + b2 —> b2 = c2 – a2
b2 = 952 – 682
b2 = 9025 – 4624
b2 = 4401
b = sqrt(4401)
b = 66.34
