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Leni [432]
3 years ago
13

What is the product of (-a + 3)(a + 4)?

Mathematics
1 answer:
spayn [35]3 years ago
8 0

Answer: The product of (-a + 3)(a + 4) is:  -a^2-a+12

Step-by-step explanation:

(-a+3)(a+4) = -a*a-a*4+3*a+3*4

=-a^{2} -4a+3a+12

now just simply combine..

=-a^2-a+12

the answer is -a^2-a+12

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A 20 ft. ladder is used against a 15 ft. wall. What is the measure of the angle made by the ladder and the ground (nearest whole
Brrunno [24]

Step-by-step explanation:

Given that,

The length of a ladder, H = 20 feet

The height of the wall, h = 15 ft

We know that,

\sin\theta=\dfrac{h}{H}

h is perpendicular and H is hypotenuse

So,

\sin\theta=\dfrac{15}{20}\\\\\theta=\sin^{-1}(\dfrac{15}{20})\\\\\theta=48.59^{\circ}

Now using Pythagoras theoerm,

b=\sqrt{H^2-h^2}\\\\b=\sqrt{20^2-15^2}\\\\b=13.2\ ft

Hence, the angle made by the ladder and the ground is 48.59° and the ladder is 13.2 feet from the wall on the ground.

6 0
3 years ago
Please solve for both it’s due tomorrow, easy points !
PSYCHO15rus [73]

Answer:

13. 0.145, 0.18, 0.206, 0.315

14. 1.75 times

<u><em>WARNING</em></u>

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8 0
3 years ago
Find the width of a rectangular prism if the volume is 546cm, the height is 7cm and the length is 13cm.
Margaret [11]

7x w x 13=546

(7x13)*w= 546

91w=546

91w/91= 546/91

w= 6

the width is 6cm

7 0
3 years ago
8 less than the product of 6 and -16
Pachacha [2.7K]

Answer:

-104

Step-by-step explanation:

Step 1: Write out expression

6(-16) - 8

Step 2: Evaluate

-96 - 8

-104

3 0
3 years ago
Lines m and n are parallel. find the value of x.<br> A. 15<br> B. 20<br> C. 65<br> D. 115
torisob [31]

Answer:

Option B, x = 20

Step-by-step explanation:

<u>Step 1:  Make an equation</u>

The values of 65 degrees and (3x + 5) are equal.

65 = 3x + 5

<u>Step 2:  Subtract 5 from both sides</u>

65 - 5 = 3x + 5 - 5

60 = 3x

<u>Step 3:  Divide both sides by 3</u>

60 / 3 = 3x / 3

<em>20 = x</em>

<em />

Answer:  Option B, x = 20

6 0
3 years ago
Read 2 more answers
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