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topjm [15]
3 years ago
8

If f(x)=-2x-3 find f(4)

Mathematics
1 answer:
Naddik [55]3 years ago
4 0

Answer:

f(4) = -11

Step-by-step explanation:

Plug in 4 for x: Note that x = 4.

f(x) = -2x - 3

f(4) = -2(4) - 3

Remember to follow PEMDAS. First, solve the multiplication, then subtract:

f(4) = (-2 * 4) - 3

f(4) = (-8) - 3

f(4) = -11

f(4) = -11 is your answer.

~

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What is the surface area of the composite solid? a rectangular prism with a length of 2 meters, width of 8 meters, and height of
Anna007 [38]

Using the formula for the surface area of a rectangular prism, the surface area of the composite solid is: C. 162m²

<h3>What is the Surface Area of a Rectangular Prism?</h3>

Surface area of a rectangular prism = 2(wl+hl+hw)

Surface area of the composite shape = surface area of the larger prism + surface area of the smaller prism - area of the face both prisms are joined together

Surface area of the larger prism = 2(wl+hl+hw) = 2(2×3 + 9×3 + 9×2) = 102 m²

Surface area of the smaller prism = 2(wl+hl+hw) = 2(2×8 + 2×8 + 2×2) = 72 m²

Area of the face both prisms are joined together = 2(l×w) = 2(3 × 2) = 6 m²

Surface area of the composite shape = (102 + 72) - 12 = 162m²

Learn more about surface area of rectangular prism on:

brainly.com/question/1310421

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4 0
2 years ago
Read 2 more answers
Someone help pls need help on this one
garri49 [273]

Answer:

\dfrac{2}{3x^5y}

Step-by-step explanation:

A negative exponent in the numerator is the same as a positive exponent in the denominator, and vice versa.

... a^-b = 1/a^b . . . . . for any value of b, positive or negative

The exponent of a product is the sum of the exponents:

... (a^b)(a^c) = a^(b+c)

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Applying these rules, you have

... = 2/(3x^4·x·y) = 2/(3x^(4+1)·y) = 2/(3x^5·y)

5 0
3 years ago
The hypotenuse of a right triangle is 65 cm, if one of its sides is 25 cm, find the length of the other side and it's perimeter
KatRina [158]

Answer:

Other side = 60

Perimeter = 150

Step-by-step explanation:

Using Hypothenuse formula

25²+B²=65²

625+B²=4225

B²=4225-425

B²=3600 (Bring Square to the other side to become Square root)

B=√(3600)

B=60

Perimeter:(Sum of all side)

60+65+25

150

5 0
3 years ago
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Aloiza [94]
It’s a constant function because it stays constant the whole time
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3 years ago
Liliana solved the equation below. When she tried to verify her answer, she realized she made an error.
leva [86]

Answer:

Step 3 of substracting 6 from both sides.    

Step-by-step explanation:

We are given the following information in the question:

We are given the equation:

\displaystyle\frac{1}{3}(x + 18) = 7

Multiplying the constant term we get,

\displaystyle\frac{1}{3}x + 6 = 7

Subtracting 6 from both the sides we get,

\displaystyle\frac{1}{3}x + 6-6 = 7-6\\\\\frac{1}{3}x = 1\\\\x = 3

Liliana made a mistake in the step of subtracting 6 from both sides. She subtracted 6 from the left side bu added 6 on the right side instead of subtracting from the right side.

7 0
3 years ago
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