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Sergeeva-Olga [200]
3 years ago
15

Tell whether a=−5 is a solution of a≤0.

Mathematics
1 answer:
guajiro [1.7K]3 years ago
6 0

Answer:

Yes it is, since a has to be less than or equal to 0, and -5 is indeed less than 0.

Step-by-step explanation:

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PLS HELP ME WITH FINDING THE VOLUME OF THIS SOLID
Fofino [41]
Lwh = (3+3+6) (4) (7)

12 x 4 x 7 = 336
3 0
3 years ago
At the craft store, Mark bought a bag of blue and brown marbles. The bag contained 20 marbles, and 30% of them were blue. How ma
kykrilka [37]

Answer:

6 blue marbles

Step-by-step explanation:

20 marbles * .30 are blue = blue marbles

20 * .30 = 6 blue marbles

5 0
3 years ago
Find a point-slope form for the line with slope 1/5 and passing through the point (-4,-9).
sattari [20]

Answer:

y + 9 = \frac{1}{5}(x + 4)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Here m = \frac{1}{5} and (a, b) = (- 4, - 9) , thus

y - (- 9) = \frac{1}{5}(x - (- 4) ) , that is

y + 9 = \frac{1}{5}(x + 4)

3 0
2 years ago
Please help with algebra problem
kumpel [21]
Number of weekend minutes used: x
Number of weekday minutes used: y

This month Nick was billed for 643 minutes:
(1) x+y=643

The charge for these minutes was $35.44
Telephone company charges $0.04 per minute for weekend calls (x)
and $0.08 per minute for calls made on weekdays (y)
(2) 0.04x+0.08y=35.44

We have a system of 2 equations and 2 unkowns:
(1) x+y=643
(2) 0.04x+0.08y=35.44

Using the method of substitution
Isolating x from the first equation:
(1) x+y-y=643-y
(3) x=643-y

Replacing x by 643-y in the second equation
(2) 0.04x+0.08y=35.44
0.04(643-y)+0.08y=35.44
25.72-0.04y+0.08y=35.44
0.04y+25.72=35.44

Solving for y:
0.04y+25.72-25.72=35.44-25.72
0.04y=9.72

Dividing both sides of the equation by 0.04:
0.04y/0.04=9.72/0.04
y=243

Replacing y by 243 in the equation (3)
(3) x=643-y
x=643-243
x=400

Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
6 0
3 years ago
What is the standard deviation for 9, 8, 1, 11, 1, 12, 9, 12, 4, 12
shtirl [24]

Answer

I can't tell what you're asking but here is all the things

Step-by-step explanation:

Total Numbers: 10

Mean (Average): 7.9

SD:  4.38305

Variance (SD): 19.21111

Population SD: 4.15812

Variance(Population SD): 17.29

6 0
2 years ago
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