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solniwko [45]
3 years ago
8

Select the proper inverse operation to check the answer to 25 − 13 = 12. A. 12 × 13 = 25 B. 12 + 13 = 25 C. 12 × 25 = 13 D. 12 ÷

25 = 13
Mathematics
1 answer:
Alchen [17]3 years ago
4 0
The answer is B. :) 12 + 13 = 25
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Eddie's Evergreens sells Christmas trees and wreaths. Trees cost 3 dollars more than 4 times the price of each wreath. It costs
kari74 [83]

Answer:

W = 16

T = 67

Step-by-step explanation:

Represent trees with T and wreaths with W

Given

T = 3 + 4 * W

2 * W + T = 99

Solving (a): Cost of W

Substitute 3 + 4 * W for T in the second equation

2*W + 3 + 4 * W = 99

2W + 3 + 4 W = 99

Collect Like Terms

2W + 4 W = 99 - 3

6W = 96

Divide through by 6

W =\frac{96}{6}

W = 16

Hence, each wreath costs $16

Solving (b): Cost of T

T = 3 + 4 * W

Substitute 16 for W

T = 3 + 4 * 16

T = 3 + 64

T = 67

Hence, each tree costs $67

3 0
3 years ago
Please help with 24-26
Inga [223]

24

The power 0 only affects the x. x^0 = 1

-2 * 1 = -2

25

Here everything inside the brackets is affected by the 0.

(11abx)^0 = 1 There is nothing left over.

26

(xy)^0 = 1

(pq)^0 = 1

1 - 1 = 0


3 0
3 years ago
Read 2 more answers
Please Help. I really don’t get this concept, if you could explain it in detail it would be very appreciated
Dafna11 [192]
<h3>Answer: 24/25</h3>

=================================================

Explanation:

Sine is given to be negative, and so is tangent. This only happens in quadrant Q4

Recall that y = sin(theta), so if sin(theta) < 0, then we're below the x axis.

If tan(theta) < 0, then this means cos(theta) > 0

So we have y < 0 and x > 0 which places the angle somewhere in Q4.

--------------------------

Draw a right triangle as shown below in the attached image. We have AC = 25 and BC = 7. Use the pythagorean theorem to find that AB = 24

So this is what your steps may look like

a^2+b^2 = c^2

7^2+b^2 = 25^2

b^2+49 = 625

b^2 = 625-49

b^2 = 576

b = sqrt(576)

b = 24

So because AB = 24, we know that the cosine of the angle is adjacent/hypotenuse = 24/25

---------------------------

As an alternative, you could use the trig identity

sin^2(x) + cos^2(x) = 1

and plug in the given value of sine to solve for cosine. The cosine value result will be positive since we're in Q4.

So,

sin^2(x) + cos^2(x) = 1

(-7/25)^2 + cos^2(x) = 1

(49/625) + cos^2(x) = 1

cos^2(x) = 1 - (49/625)

cos^2(x) = (625/625) - (49/625)

cos^2(x) = (625-49)/625

cos^2(x) = 576/625

cos(x) = sqrt(576/625)

cos(x) = sqrt(576)/sqrt(625)

cos(x) = 24/25

This is effectively a rephrasing of the previous section since the pythagorean trig identity is more or less the pythagorean theorem (just in a trig form)

6 0
3 years ago
Assuming that Hamid’s revenue is found by multiplying the book price by the number of copies sold, create an equation (in standa
Vadim26 [7]

An equation of Hamid’s revenue by multiplying the book price by the number of copies sold is  x = ny.

<h3>What is an equation?</h3>

The process of equating one thing with another.

Let Hamid’s revenue is $x and the price of book is $y.

If he sold n number of copies.

Then, the general equation will be x = n * y.

Therefore, an equation of Hamid's revenue will be x = ny.

Know more about equation here:

brainly.com/question/2263981

#SPJ1

5 0
1 year ago
How much space does the triangle cover? Triangle with a base of 4 cm and a height of 12 cm Group of answer choices
aleksley [76]

Answer:

24 square centimeters

Step-by-step explanation:

How much space does the triangle cover? Triangle with a base of 4 cm and a height of 12 cm

We are to find the area of the triangle

Area of the Triangle = 1/2 × Base × Height

= 1/2 × 4 × 12

= 24 square centimeters.

Therefore, the triangle will cover a space of 24 square centimeters.

3 0
3 years ago
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