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Arisa [49]
3 years ago
13

Evaluate -7x + y5x When x = -3, y = -9

Mathematics
2 answers:
Semmy [17]3 years ago
8 0

Answer:

156

Step-by-step explanation:

-7(-3)+(-9)(5)(-3)

21+135

156

maria [59]3 years ago
8 0

Answer:

<em>156</em>

Step-by-step explanation:

  • Substitute x and y values in the equation

-7x+y5x

(-7)(-3)+(-9)*5*(-3)

21+135

<em>156</em>

<em>Hope you got it </em>

<em>If you have any question just ask me</em>

<em>If you think this is the best answer please mark me as brainliest</em>

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27millimeters. 1cm/10mm
Alla [95]
If you would like to know how many centimeters are 27 millimeters, you can calculate this using the following steps:

1 cm ... 10 mm
x cm = ? ... 27 mm

1 * 27 = 10 * x
27 = 10 * x    /10
x = 27/10
x = 2.7 cm

The correct result would be 2.7 cm.
5 0
3 years ago
Read 2 more answers
Your round trip drive to school is 3 7/10 miles.how many miles do you drive to and from school in 5 days?
riadik2000 [5.3K]

Answer:

18 1/2 miles

Step-by-step explanation:

3 7/10 * 5

Change to an improper fraction

(10* 3 + 7)/10    * 5

37/10 *5

Rewriting

37 * 5/10

37/2

Changing back to an mixed number

2 goes into 37 18 times with 1 left over

18 1/2

5 0
3 years ago
Consider the vector add = a + b = [13 12 11 10 10] and sub = a - b = [-11 - 6 - 14 8]. Find the vector a and b.
prisoha [69]

Answer:

a = [1   3   5   7   9] and b = [12   9   6   3   1]

Step-by-step explanation:

The addition of two vectors a and b is defined as

a + b = [13   12   11   10   10]                .... (1)

The subtraction of two vectors a and b is defined as

a - b = [-11   - 6   - 1   4    8]                 .... (2)

After adding (1) and (2), we get

(a + b) + (a - b)= [13   12   11   10   10] + [-11   - 6   - 1   4    8]

On simplification we get

2a = [13-11   12-6   11-1   10+4   10+8]

2a = [2   6   10   14   18]

Divide both sides by 2.

a = [1   3   5   7   9]

Substitute the value of vector a in equation (1).

[1   3   5   7   9] + b = [13   12   11   10   10]

Subtract vector a from both sides.

b = [13   12   11   10   10] - [1   3   5   7   9]

On simplification we get

b = [13-1   12-3   11-5   10-7   10-9]

b = [12   9   6   3   1]

Therefore the vectors a and b are defined as a = [1   3   5   7   9] and b = [12   9   6   3   1].

4 0
3 years ago
Describe the three basic uses of percentages. Give a sample statement that uses percentages in each of the three ways. What is o
nadezda [96]
Percentages can be used for discounts in shops - 50% off cookies
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4 0
3 years ago
PLEASE HELP! Screenshot attached
nadya68 [22]

Answer:

( x - 6 ) ( x - 3 ) (x + 4)

Step-by-step explanation:


6 0
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